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HomeMy WebLinkAboutItem 4A - Public Comment for Zoning of 16 Pickleball Courts Adjacent Residential Properties - Leahy emailFrom:Charles.leahy@sbcglobal.net To:Ken Lyon; Anthony Riederer; Christopher Hadwin; Anita Fields Cc:Jeff Ballinger-C; Carl Schmits Subject:Public Comment for Zoning of 16 Pickleball Courts Adjacent Residential Properties Date:Tuesday, June 10, 2025 8:30:36 AM Attachments:Pickleball Sound 103.pdf To Planning 6-9-2025.pdf NOTICE: This message originated outside of The City of Palm Springs -- DO NOT CLICK on links or open attachments unless you are sure the content is safe. Enclosed are my public comments for today's meeting. Thank you, please call if you have any questions. Charles Leahy, Pickleball Noise Consultant Cathedral City, CA.- 313-402-8177 To: Ken Lyon, Principal City Planner – Ken.Lyon@palmspringsca.gov Anthony Riederer, Assistant Planning Director – Anthony.Riederer@palmspringsca.gov Christopher Hadwin, Director of Planning Services – Christopher.Hadwin@palmspringsca.gov Anita.fields@palmspringsca.gov Jeff.Ballinger-C@palmspringsca.gov Copy: Carl Schmits, Chief Technical Officer, USA Pickleball, carl.schmits@usapickleball.org From: Charles Leahy, Pickleball Noise Consultant, 69411 Ramon Rd Cathedral City, CA charles.leahy@sbcglobal.net 313-402-8177 Member, Acoustical Society of America, Institute of Noise Control Engineers, National Recreation and Parks Association, USA Pickleball Date: June 9, 2025 Re: Objections and Recommendations Regarding DP-2024-0007 / AMM-2024- 0013 Proposed 16-Court Pickleball Complex at Ramon Road and Airport Center Drive Dear Mr. Lyon, Mr. Riederer, and Mr. Hadwin, I am writing to express serious concerns regarding the proposed 16-court commercial pickleball complex at the southwest corner of Avenida Evelita and Airport Center Drive. After careful review of the staff report, architectural plans, and zoning documents, I believe the project, as proposed, is incompatible with the General Plan, underestimates noise impacts, misapplies zoning categories, and lacks critical environmental and accessibility considerations. 1. Residential Proximity Severely Understated The site is directly across Ramon Road from a residential area comprising 25 existing homes and several vacant lots within 500 feet. Many more homes are within the well-known 1000-foot radius of pickleball noise propagation. The nearest home is only 200 feet away; the closest vacant lot is just 150 feet from the court perimeter. The claim in the staff report that residences are “far enough away” is demonstrably false. These lots may become unbuildable due to chronic noise exposure. The project poses a direct and adverse impact on adjacent residential land use rights. 2. Noise Impacts Minimized Without Evidence The applicant proposes daily hours of 6am to 11pm — 17 hours of impulsive impact noise, totaling up to 14,400 percussive paddle strikes per hour from the 16 courts combined. These are not ambient sounds; they are distinct, repetitive, tonal "pops" that spike higher in frequency and volume than traffic or airport noise. These are the “intrusive” noises identified in the General Plan. The staff report's dismissal of noise concerns based on nearby traffic and airport activity is speculative and not supported by a sound study of any kind. The City cannot make a CEQA categorical exemption finding without a proper technical analysis of site-specific acoustic impacts. Noise burdens on the adjoining residences will be greatest during the evenings and on weekends and holidays when traffic on Ramon Road is moderated. Noise concern is extensively addressed in Pickleball Sound 103: Mitigating Pickleball Sound – Is Pickleball Compatible with Residential Environments? by Barry Wyerman and Robert Unetich, presented at NoiseCon 2023, Institute of Noise Control Engineers. The full paper is attached to this letter for your review. 3. No Qualified Noise Study The staff report's suggestion that noise will not pose a “detriment” is purely speculative. No field testing or predictive modeling has been performed. The failure to require a qualified noise study — particularly for a project with extended hours, hard-surface paddles, and large court density — is inconsistent with best planning practices and environmental due diligence. 4. Land Use Classification Is Misapplied The site is zoned Neighborhood/Community Commercial (NCC). By the City’s own descriptions (via engagepalmsprings.com, planning.org, and the General Plan), NCC zones are intended for neighborhood-serving, convenience-oriented uses. This project includes paid reservations, regional marketing, alcohol service, and a two-story concessions/viewing deck, indicating it will draw customers from outside the neighborhood and city. The project’s scale, use type, and service area indicate it exceeds NCC criteria. A more appropriate zoning framework would be RC (Recreational Commercial), MU (Mixed Use), or a PUD/CUP, where detailed oversight of noise, traffic, parking, and compatibility is properly integrated. 5. Commercial and Entertainment Use With its monetized court scheduling, food/beverage operation, and planned beer/wine license, the project should be treated as an entertainment destination. It will draw non-neighborhood patrons who remain to socialize after play. This function extends well beyond what is contemplated under a simple “recreational use” in NCC zoning. 6. Accessibility Deficiencies None of the proposed 16 courts meets USA Pickleball’s published design standards for wheelchair-accessible play. The City must ensure ADA compliance with newly built public or commercial sports facilities. 7. Insufficient Parking A 10% reduction in parking has been requested despite dual demands: playtime and food/beverage dwell time. Fifty-five spaces are unlikely to serve the projected number of patrons and staff during peak periods. This could lead to a spillover onto surrounding streets and future complaints. 8. Recommendations • Require a qualified noise study, including compliance with: o California Code 3479 and 3480 for private and public nuisance o Municipal code Section 11.74.040 General Guidelines o Municipal code Section 11.74.031 Noise Level Decibel Limit o General Plan Section PS1 and provision for “intrusive” noise. o CEQA and California Noise Control Act • Consult with Carl Schmits, Chief Technology Officer of USA Pickleball, to identify an experienced engineering firm. o Email: carl.schmits@usapickleball.org • The noise study should consider and discuss strong mitigations, as recommended in Pickleball Sound 103: o A full sound barrier along Ramon Road and partial barrier on East and West to prevent flanking around the ends o Use of OWL paddles and Librarian Foam balls o Reduced hours (e.g., 8am–7pm, no play on evenings, Sundays and holidays due to reduced ambient traffic noise on Ramon) • Designate at least one handicap-compliant court • Ban outdoor amplified music or announcements • Reconsider the NCC designation • Conduct a full zoning consistency and traffic/parking evaluation • Relocate the facility to inside a building or an outdoor commercial or industrial parcel at least 1,000 feet from residences if compliance and mitigation cannot be achieved. 9. Relevant Precedents To Consider • Bobby Riggs Racket & Paddle Club, Encinitas – ongoing residential noise complaints and city enforcement activity SanDiegoVille: Iconic San Diego Pickleball Venue Threatened By Potential Shutdown • Torrance, CA – pickleball zoning ordinance requires minimum 250-foot setback from nearest court to the residential property line • San Clemente – San Gorgonio Park – pickleball courts permanently closed after neighbors sued and won a legal settlement over noise nuisance 10. Here is the Sound of Pickleball on 12 Courts 12 pickleball courts.m4a • There are many hits, which depend upon the number of courts in action. 16 courts will be more hits than the 12 courts in this recording. • Impulsive pops are created at the rate of about 15 per minute for each court, 900 per hour for each court. • The loudness of the hits is going up and down, depending on how hard the ball is hit and the equipment being used • The spacing between the individual popping noises is random and unpredictable – what you hear is “pop -- pop,pop,pop – pop,pop -- pop.” • The player noise is separate and additional to the popping noise. • There can be extra noise such a distant lawn mower, vehicle drive-by, etc. • This is only one minute, these neighbors will hear this for 17 hours a day, seven days a week. • The loudness for each neighbor depends upon factors such as the distance to their property, noise reflections off intervening structures, weather conditions, etc. Attachment • Pickleball Sound 103: Mitigating Pickleball Sound – Is Pickleball Compatible with Residential Environments? Barry Wyerman & Robert Unetich, NoiseCon 2023 Appendix – Qualifications Charles E Leahy Attorney (licensed in Michigan) and Mechanical Engineer Harbor Springs, MI Cathedral City, CA 313-402-8177 Charles.leahy@sbcglobal.net Linkedin: (14) Charles Leahy | LinkedIn Presentation of Continuing Legal Education to the International Municipal Lawyers Association, Nov 2024: 2024-Nov-12-Charles-Leahy-Intl-Municipal-Lawyers-Assn-3.pdf Presentations at the Acoustical Society of America, Ottawa Canada, May 2024: Pickleball Courts in a Legal Pickle #ASA186 Publications Preliminary analysis of 79 pickleball noise consultant reports by 36 consultants | Proceedings of Meetings on Acoustics | AIP Publishing Memberships Michigan Bar Association National Recreation and Parks Association Acoustical Society of America Institute of Noise Control Engineers USA Pickleball Disclaimer – I am an attorney licensed in Michigan. I am not your lawyer unless we have signed a retainer agreement. I do not practice law or offer legal advice in other states. You should consult an attorney in your state for any legal questions. Pickleball Sound 103 - Mitigating Pickleball Sound - Is Pickleball Compatible with Residential Environments? Barry Wyerman1 and Robert Unetich2 Pickleball Sound Mitigation LLC 1811 Woodlands Circle Pittsburgh, PA 15241 ABSTRACT The popularity of pickleball has created many avid players seeking more pickleball courts in community parks, apartment complexes, homeowners’ associations, country clubs, and residential neighborhoods. Existing tennis courts are often used for both tennis and pickleball. Nearby residents accustomed to sounds from tennis will hear a louder sound from pickleball and a sound with different tonal qualities. Depending on the sound level and the distance from the pickleball court, pickleball sound can be a source of annoyance. Several explanations are given why community noise ordinances fail to properly address pickleball sounds. Sound mitigation strategies for pickleball play are described that follow traditional approaches for noise control at the source, along the path, and at the receiver. These approaches include use of commercially available acoustical materials, reorientation of courts, preferred paddles and balls, new site locations, and play schedules. The expected noise reductions for each option are outlined to help determine if pickleball noise can be compatible with residential environments. Estimates of minimum distances from courts where pickleball sound will not be an annoyance are made considering the background sound and the sound mitigation in place. 1. INTRODUCTION Pickleball is a game played with two to four players using paddles, a ball, and a net on a court that is approximately one half the length and width of a tennis court (1). Each paddle and ball impact during a game creates a short pulse of sound that varies in intensity, duration, and frequency content (2,3). For homeowners near pickleball courts, pickleball sounds can become bothersome and intrusive. Pickleball was created in 1965 in Bainbridge Island, Washington (4) and now has a worldwide following. Its growth is a result of players being introduced to this sport during winters in Florida or Arizona and then returning to their homes in search of pickleball courts. The rapid growth of pickleball has created a demand for more pickleball courts in communities across the United States and globally. Because the game is easy to learn and is very engaging, pickleball players are passionately committed to this sport. Apps exist to locate the closest pickleball courts for any zip code. A common solution for adding pickleball courts in many communities is to use existing tennis courts and create dual purpose courts. Tennis courts found in community parks, apartment complexes, ______________ 1 wyerbr@sbcglobal.net 2 itsrmu@aol.com homeowners’ associations, country clubs, and residential neighborhoods are being used for pickleball. In some cases, tennis courts have been re-purposed as pickleball courts. In this case, up to four pickleball courts can be added in the space of one tennis court. The popularity of pickleball has also created community and homeowner awareness of the unmistakable “popping” sound when a paddle strikes a ball. The unique time and spectral characteristics of pickleball play make these sounds easily distinguishable from other sounds. Pickleball sound levels and sound mitigation options are important to communities faced with a growing demand for more pickleball courts and to residents living close to any court where pickleball is played. The location and design of these courts then becomes critical to avoiding noise complaints from residents who live nearby. A common question on social media is, “How far away do pickleball courts need to be to avoid noise problems?” There is no simple answer other than, “It depends.” The purpose of this study is to show the differences between sound from pickleball and tennis, to review how noise ordinances address pickleball sound, to outline a measurement method and noise limit to properly quantify pickleball sound, and to describe pickleball sound mitigation strategies. 2. THE SOUNDS OF PICKLEBALL AND TENNIS To compare the sounds from pickleball and tennis, the impact sound was measured with a ball drop onto a pickleball paddle and a tennis racquet mounted in a test chamber. The ball speed was 18.9 miles per hour at impact. Figure 1 shows the 1/3 octave spectrum and the maximum sound level for A-weighted, fast response (LAFmax) measurements for the paddle and the racquet impacts. The pickleball impact generates a higher overall sound level and has more high frequency content than the tennis impact. Figure 1 – Pickleball and tennis impact from a dropped ball at 18.9 MPH The pickleball impact at 86 LAFmax is over 20 dB higher than the tennis impact at 62.9 LAFmax. This difference shows that pickleball can be 4 or more times louder than tennis. It explains why pickleball sound is receiving attention when former tennis courts are used for pickleball. The loudness of each pickleball impact can further vary based on the paddles and balls being used, the skill level of each player, and the force of each impact. 0 10 20 30 40 50 60 70 80 90 200 315 500 800 1250 2000 3150 5000 8000 12500SPL (dBA)1/3 octave center frequency (Hz) Paddle LAFmax=86 Tennis racquet LAFmax=62.9 3. NOISE ORDINANCES AND PICKLEBALL 3.1. Community noise ordinances Noise is sound that annoys. Community noise ordinances establish noise limits so that sound is neither annoying nor bothersome, even though it may be audible. These ordinances are not intended to establish a limit where sound is inaudible. They are intended to establish a limit where the presence of sound above a background sound level will not be objectionable. The background sound level is the result of wind, birds, normal ambient activity, and traffic. Noise ordinances vary in their ability to quantify annoyance from pickleball noise. A survey of several noise standards for US cities shows several common themes. • Failure to address impulsive noise – Measurement methods for continuous noise understate pickleball impacts and can conclude that these impacts are in compliance with a noise limit. • A 5 dB penalty for any noise that is impulsive noise – This adjustment adds more substance to an ordinance but often omits the noise measurement settings. Even when a 5 dB penalty is added to an impulse measurement made with a slow meter setting, this will understate the loudness of a pickleball impact. • Limits based on average values from fast settings – Average or mean values are several standard deviations below the maximum sound that can occur. These maximum sound levels are typically the cause of annoyance. • Limits based on dB peak – Peak noise measurements are not applicable to pickleball noise because they do not capture the duration of the impact. • Limits based on a subjective response – Wording such as, “It is unlawful for any noise that interferes with the enjoyment of life of a reasonable person” means that a noise complaint could only be resolved with a court case. • Exclusion of noise limits for public parks or sporting events – This exclusion would assume that a prior noise study was completed with no noise issues identified before a pickleball court was constructed. 3.2. Recommended noise ordinance A recommended noise limit for pickleball has been established based on an average LAFmax from several measurements and the background sound level. When the background sound level is below 47 dBA, the limit is an average of 50 LAFmax. The average LAFmax comes from 4 individual LAFmax measurements of 60 seconds each. When the background sound level is above 47 dBA, the limit is LAFmax = background sound + 3 dB. This variable limit accounts for the presence of high background sound. This limit has been successfully used to quantify sound from pickleball, to evaluate the risk of pickleball noise complaints, to perform site studies for pickleball courts, and to evaluate the effectiveness of pickleball sound mitigation strategies. 4. PICKLEBALL SOUND MITIGATION STRATEGIES The common approach to solving any noise control problem is to investigate solutions involving the source, the path, and the receiver (SPR). Effective noise control at the source can eliminate the need for noise control along the path or at the receiver. This can mean either reducing the sound power of the noise or controlling the noise at the source before it travels along multiple paths to a receiver. Often, all three approaches must be used to achieve the desired noise reduction. Several sound mitigation strategies are available for reducing pickleball sound. These options can be applied at the source, along the path, or at the receiver. Some options are more effective in reducing sound. Some are easier to implement. Some are lower in cost. Some are easier to control. Each option will be described, and then, all of these will be compared. 5. PICKLEBALL NOISE CONTROL AT THE SOURCE 5.1. Recommended paddles As pickleball technology has evolved, so have the new composites and materials that are being used in paddle construction. This has resulted in many different paddle designs with over 1700 paddles approved by USA pickleball for tournament play. Some paddles produce lower sound levels than others. However, the technology has not evolved to the point where any paddle can be considered a stealth paddle. Several paddles have been tested in a chamber to identify paddles with lower noise signatures than older, louder paddles (3). These recommended paddles can be from 3 to 7 dBA quieter than the loudest paddles. The key to reducing paddle noise is to reduce paddle vibration, shift the sound energy to frequency bands below 1000 Hz, and increase damping. The green paddle list by Sun City (5) includes recommended paddles for lower noise. These paddles will reduce but not eliminate pickleball sounds. A mandate to use paddles from an approved list is always hard to enforce for recreational players who are accustomed to playing with a preferred paddle. To help with enforcement, a community could purchase enough loaner paddles so that all players would use the same model of a quieter paddle. 5.2. Recommended balls While many plastic balls are approved for pickleball play, some balls produce slightly lower sound levels when struck with a paddle. The sound level difference among balls is much less than the difference among paddles. Balls have been tested in a chamber to select balls with lower noise signatures than some of the louder balls. These recommended balls can be from 1 to 3 dBA quieter than the loudest balls. These balls will reduce but not eliminate pickleball sounds. A mandate to use balls from an approved list is always hard to enforce for recreational players. To help with enforcement, a community could purchase and supply balls that are considered quieter than the loudest balls and only allow pickleball play with this model of ball. A recommended paddle and ball combination for lowest noise should be evaluated for noise at a pickleball court to compare sound levels and reactions before any restrictions or community decisions are made. 5.3. Court time Restricting court time has the effect of an on-off switch for pickleball. This can be controlled on courts with a gated entry that can be locked. However, restricted play time limits the hours of court availability. This is something a community should review based on the availability of alternate courts, the number of pickleball players, and critical times for noise such as early morning or late evening. 5.4. Enclosures A simple solution to any noise problem is to build a box around the sound source so that sound does not escape. For pickleball, this means an indoor facility. The preferred enclosure for pickleball play could be a repurposed warehouse, a vacant commercial building, or a metal building. Air supported structures (known as tennis bubbles and often used for winter tennis or golf) can also enclose pickleball. The walls of an air supported structure do not provide as much transmission loss as a traditional building structure, but they may be sufficient for pickleball sound reduction. These enclosures keep the sound inside and shield nearby homeowners from pickleball sounds. An indoor pickleball facility could also provide year round pickleball play. The cost of such a facility is often offset by a membership fee or daily player fee. 5.5. New Site Selection A new site is the equivalent of moving the noise source to a new location. Any new pickleball site should be far enough away from homes to avoid complaints from residents without incurring the added cost of sound mitigation. This does not mean that a new pickleball site must be remote from a city center. Alternative pickleball sites within a city center that are less likely to have noise complaints are sites near a highway, near an airport, or near an industrial zone. The higher noise limits of industrial zones, the higher background sound levels, and the lower land values of these sites often make them attractive sites for expansion of pickleball play. Table 1 shows estimates for the minimum distance between a court and a home to avoid pickleball complaints by considering both background sound and sound mitigation. These minimum distances are determined using a reference LAFmax measured at 100 feet, sound attenuation at 6 dB per doubling of distance, sound mitigation, and a variable background sound limit. For example, if the background sound level is 45 dBA and no mitigation is in place, the minimum distance to the nearest residence should be 977 feet. At higher background sound levels and with added sound mitigation, this distance can be reduced. Table 1 – Estimates of the minimum distance in feet from courts to avoid pickleball complaints (1) Background sound (dBA) 45 dBA 50 dBA 55 dBA 60 dBA Distance (ft)– no mitigation 977 687 377 202 Distance (ft)– 10 dB mitigation 292 202 103 48 Distance (ft)– 20 dB mitigation 77 48 17 1 (1) The distances in Table 1 are based on standard sound attenuation with distance. Variations in sound attenuation with distance occur due to wind direction and speed and to atmospheric refraction. The temperature profile above the ground can bend the sound waves upward or downward (6). This can result in increases or decreases in these minimum distances. 5. PICKLEBALL NOISE CONTROL ALONG THE PATH 5.1. Acoustical Barriers Acoustical barriers block the direct path of sound that travels from a source to a receiver. A barrier must be massive enough to block sound that could pass through it. The recommended weight for a barrier is one pound per square foot. Even with a massive barrier, a small amount of sound still passes over the top or around the edges of the barrier via diffraction. The sound reduction with a barrier is limited by the height and width of the barrier. If the barrier height is restricted due to a local code or due to the support strength of an existing fence, then the sound reduction over the barrier will be reduced. In this case, the weight of the barrier may be reduced below one pound per square foot. The barrier must be solid with no holes, no gaps at the bottom, and no gaps between adjoining panels. Any holes or openings will allow sound to leak to the other side. Earth mounds and buildings can function as barriers if they disrupt a direct path of sound. Shrubs, bushes, and trees are not barriers even though they block a line of sight. They are not massive and solid enough to block sound. A small amount of sound attenuation may be achieved with a dense planting of hedges, but this would not provide more than 2 to 3 dB sound reduction. The effectiveness of any barrier is controlled primarily by its height and then by its width. The barrier must be tall enough and wide enough to minimize the sound that is diffracted or bent over the top and around the edge. Figure 1 shows multiple ray paths between one sound source and one receiver over a 30 foot tall barrier around a pickleball court using sound mapping software (6). Figure 1 – Three dimensional sound map showing ray paths over 30 foot barriers to receiver The sound attenuation by barriers 5, 10, 20, and 30 feet high was determined with the use of noise modeling software. Figure 2 shows the omnidirectional sound field from a pickleball impact with no barrier in place. Sound attenuation with distance is evident. The receiver positions are at 20 and 40 feet behind the source and at 20, 40, 80, and 160 feet in front of the source. Figure 3 shows the sound field at the same receiver locations with a 10 foot barrier placed 10 feet from the source. On the source side of the barrier, a slight increase in dB level is seen. This is due to the sound from the front of the paddle being reflected from the barrier and combining with the direct sound from the rear. On the receiver side of the barrier, the sound level decreases with distance. At each receiver location, the difference between the sound level with no barrier and the sound level with the barrier is the barrier attenuation. Comparing Figure 3 to Figure 2, the change in sound level at each receiver location is the added sound attenuation by the barrier. Similar sound fields were created for barrier heights of 5, 20, and 30 feet. Figure 2 – Sound field with no barrier Figure 3 – Sound field with 10 foot barrier and at 10 feet from source Figure 4 shows the added barrier attenuation at several distances from the barrier. This attenuation is in addition to the normal noise attenuation with distance. The greatest attenuation with a barrier occurs when the receiver is closest to the barrier. This is the shadow zone. At greater distances from each barrier, the added sound attenuation by each barrier is constant. A 5 foot barrier provides minimal sound attenuation, and a 30 foot barrier is unlikely to be feasible. Nevertheless, these heights are displayed to show where sound attenuation with a barrier reaches a limit. Therefore, further evaluation of 20 and 30 foot barriers will be investigated. Figure 5 shows the attenuation with 10 foot and 20 foot high barriers as the sound source is moved farther from the barrier. Figure 4 – Barrier attenuation with height for source at 10 feet from barrier Figure 5 – Sound attenuation for 10 and 20 foot barriers for source at 10 and 20 feet from the barrier These results from Figures 4 and 5 show the following conclusions for barriers. • The greatest sound reduction with any barrier height occurs closest to the barrier - this is the shadow zone. • The sound reduction with a barrier decreases as a receiver is farther from a barrier. • An increase in barrier height from 5 feet to 10 feet provides an additional 10 dB of sound reduction. • Smaller improvements in sound reduction occur with an increase from 10 feet to 20 feet. • Beyond 20 feet in barrier height, the incremental sound reduction becomes less with barrier height. 0 5 10 15 20 25 30 0 50 100 150 200 250Added barrier attenuation (dBA)Receiver distance from barrier (ft) 30 foot barrier, 10 ft to source 20 ft barrier, 10 ft to source 10 ft barrier, 10 ft to source 5 foot barrier, 10 ft to source 0 5 10 15 20 25 30 0 50 100 150 200 250Added barrier attenuation (dBA)Receiver distance from barrier (ft) 20 ft barrier, 10 ft to source 20 ft barrier, 20 ft to source 10 ft barrier, 10 ft to source 10 ft barrier, 20 ft to source The general guideline for a barrier is that lowest sound level will be measured with a receiver as close as possible to the highest possible barrier If there are no homes exposed to direct pickleball sound on any side of a court, then a barrier can be eliminated on that side. In some cases, it may be best to enclose all four sides of a pickleball court with the highest barrier possible. A detailed acoustical mapping of any site is recommended to evaluate the noise reduction benefits of any barrier before a purchase is made. A contractor must be consulted to assure that an existing fence or a new fence can support the added weight of a barrier. Wind loads on the barrier are also to be considered. 5.2. Higher Barriers Any increase in the height of an existing barrier will provide more sound reduction. Figure 4 shows that heights beyond 20 feet will yield lower incremental sound reduction. 5.3. Acoustical Barriers with Sound Absorbing Liners Acoustical barriers block sound. but this blocked sound is then reflected in the opposite direction. If the reflected sound must be controlled for receivers in the path of the reflected sound, then barrier walls with sound absorbing surfaces should be used. The sound absorbing surface includes a weather resistant fiber covered by a weather resistant, protective, porous cloth. If reflected sound to an opposite side of the court is a problem, this can add 3 dB of additional noise reduction in this direction. 5.4. Court Reorientation Changing the court orientation 90 degrees can achieve a small reduction in sound levels due to the directivity of the pickleball sound. The sound level to the side of a paddle is 3 to 5 dB less than from the front of the paddle but this is not a constant due to the movement of players on the court. If tennis courts are being converted to pickleball or new pickleball courts are being considered, then the court orientation should be considered for sound propagation. 6. PICKLEBALL NOISE CONTROL AT THE RECIVER 6.1. Barriers Barriers near the receiver provide the same sound attenuation with height and distance as barriers near the source. Figures 4 and 5 can be used to estimate barrier sound reduction near the source. 6.2. Sound masking Sound masking is the introduction of a second sound that will override or interfere with the bothersome sound. Common outdoor masking sounds include the sound from a fountain, a waterfall, ocean waves, or highway traffic. Masking sound can also be artificially created with speakers to simulate any ambient sound. For masking sound to be effective with pickleball, it must be 6 to 10 dB or more louder than the pickleball sound. These masking sounds can literally “swallow up” a lower level offensive sound, but the offending sound is now replaced by a higher level masking sound. Even at a higher sound level, the continuous masking sound may be more acceptable than intermittent pickleball impulses. If this is to be considered, a trial is recommended using a Bluetooth speaker and several masking sounds like a waterfall or a fountain at different elevated sound levels. This is because the ear can selectively differentiate between sounds with different tonal characteristics. 7. NOISE MITIGATION COMPARISONS Table 2 shows a comparison of each noise mitigation strategy at the source, along the path, and at the receiver. The legend shows how each strategy can be compared. The player and resident reaction are estimates based on responses experienced from these groups on multiple projects. In some cases, applying multiple strategies will have an additive effect. This means that 10 dB barrier reduction plus 4 dB paddle reduction plus 2 dB ball reduction can achieve a total reduction of 16 dB – if paddles and balls can be controlled. Table 2 – Comparisons of pickleball sound mitigation strategies The amount of sound mitigation required should always consider an ambient background sound level. A location near a busy highway or in an industrial zone with a higher ambient sound level than near a country club or community park will not require as much noise reduction. At a known distance from a pickleball court, Table 1 shows the sound mitigation required to have pickleball at an acceptable level depending on background sound level. The question of whether pickleball can be compatible with residential environments therefore depends on the distance from the court to the nearest home, on the background sound level, and the sound mitigation in place. Experience has shown that pickleball courts at 100 feet or less from a home will require extreme sound control measures to be compatible with a residential environment. Pickleball courts at 100 or more feet from a home will require moderate sound mitigation for pickleball sound to be compatible. Pickleball courts at 1000 feet or more from a home will be compatible without any mitigation required. In some cases, the distance to the nearest home may be too close to allow pickleball play even with multiple noise reduction strategies in place. 8. CONCLUSIONS Tests show that a pickleball impact is 4 times louder than a tennis impact and has more high frequency content. This makes pickleball play on tennis courts a potential noise problem for nearby homes. Noise ordinances do not properly quantify the sound from pickleball impacts and often understate the level of Pickleball noise mitigation strategy Maximum dB reduction Cost to City Ease of Control Player Reaction Resident Reaction Control at source Paddles < 7 dB 0 - - -- + + Balls < 3 dB 0 - - -+ + Court time on or off 0 + + +- - -+ Enclosure > 30 dB - - -+ + ++ + ++ Tennis bubble > 20 dB - - -+ + ++ + ++ New site selection unlimited - - -+ + ++ + ++ + + Control along path Acoustical barriers 10 ft up to 15 dB - - + + ++ + + + Higher barriers < 5 dB - - -+ + ++ + + Barriers with absorption < 3 dB - - -+ + ++ + + + Site re-orientation < 3 dB - + + ++ + 0 Control at receiver Acoustical barriers 10 ft up to 15 dB - - + + ++ + + + Sound masking 6 to 10 dB louder - - + + +0 - Key Description + + +Most favorable + + More favorable + Favorable 0 Neutral - Unfavorable - - More unfavorable - - -Most unfavorable this impact. A variable noise limit based on the relationship between LAFmax and background sound level has been successfully used to evaluate the annoyance of pickleball sound and the amount of sound mitigation required to avoid annoyance. Several sound mitigation strategies have been described when sound from pickleball play must be reduced to be compatible with a residential environment. The most effective strategy is the use of acoustical barriers which must be as tall and as close to the sound source as possible for maximum effectiveness. Quieter paddles and balls can help reduce noise but may be difficult to enforce. In general, pickleball courts less than 100 feet from a home will require extreme sound mitigation measures to be compatible with a residential environment. Pickleball courts more than 100 feet from a home will require one or more sound mitigation measures to not be considered an annoyance. At 1000 feet or more from a home, pickleball courts will not require any sound mitigation. As the number of courts increases to meet the needs of avid pickleball players, acoustical engineers must consider these sound mitigation options for pickleball to be considered a good neighbor. ACKNOWLEDGEMENTS The authors gratefully acknowledge the pickleball players and the communities that have helped to evaluate and validate these strategies to achieve successful results for pickleball sound. REFERENCES 1. USA Pickleball, https://usapickleball.org/. 2. Wyerman, B., & Unitech, R., Pickleball Sound 101 – The Statistics of Pickleball Noise and a Recommended Noise Standard, NoiseCON 2023, Grand Rapids, MI, May 15-18, 2023. 3. Wyerman, B., & Unitech, R., Pickleball Sound 102 – Time History and Spectral Analysis of Pickleball Sound, NoiseCON 2023, Grand Rapids, MI, May 15-18, 2023. 4. Lucore, J., & Youngren, B., History of Pickleball, More Than 50 years of Fun, Jennifer Lucore, 2018. 5. Green Paddle List – https://springbrook- hills.com/resources/Documents/Board/Sun%20City%20Green%20Zone%20List.pdf 6. Everest, F., & Pohlmann, K., Master Handbook of Acoustics, 5th edition, McGraw Hill, 1979. 7. https://noisetools.net/dbmap/ - Noise Mapping Tool