SOUND SOLUTIONS from ZERO Acoustical …

1 SOUND SOLUTIONS from ZEROHigh-Performance Acoustical Gasketing nothing else is good enough for long enough!Established in 1924, zero INTERNATIONAL is recognized as a technological innovator in the design of integrated door sealing systems for demanding applications . We have morethan 75 years of experience in designing, manufacturing andsupporting high-performance Acoustical gasketing for all types of facilities. Among those are performing arts centers, recording studios, commercial offices, hospitals, schools andapartment buildings, as well as industrial plants. The sum ofour experience and expertise translates to SOUND advice andeffective SOLUTIONS you can count StudiosNew York CityBristol Myers Squibb Corporate HeadquartersNew Brunswick, New JerseyCivic Center Music HallTulsa, OklahomaCNN StudiosAtlanta, GeorgiaDisney AnimationAnaheim, CaliforniaDisney JapanJapanFBI LaboratoryQuantico, VirginiaHBO ProductionsNew York City HallLos Angeles, CALDS ChurchSalt Lake CityLincoln CenterNew York CityMaryland Center for Performing Arts,University of MarylandCollege Park, MarylandMerck & Company, Inc.

2 Corporate HeadquartersReadington, New JerseyZERO Acoustical gasketing has provided soundsolutions for hundreds of facilities covering a fullspectrum of functions and SOUND control are just a few of our projects:New Jersey Devils Training FacilityWest Orange, New JerseyPerforming Arts CenterColumbus, GeogiaRadio City Music HallNew York CityRight Track Recording StudiosNew York CityRock & Roll Hall of FameCleveland, OhioSilvercup StudiosLong Island City, New YorkSmithsonian Institute, National Museum of Ameri can HistoryWashington, of ArizonaKUAT Radio StationTucson, ArizonaUniversity of NorthCarolina School of MusicGreensboro, North Air Terminal,LaGuardia AirportNew York News & World ReportNew York Dept.

3 Of DefensePentagon Building,Washington, Noise Problem ..1 Defining Your Noise Problem: The First Step to Solving It ..2 The Mechanics of SOUND Transmission ..3 SOUND Transmission Loss (TL) ..3 SOUND Transmission Class (STC) ..3 The Vital Role of Acoustical Gasketing ..5 What Does It Mean to You?.. Practical applications ..6 Expert Help From a Promise ..6 Using Gasketing to Upgrade an Existing Door ..7 Designing Openings for Maximum SOUND Control ..7 SOUND TRAP SOLUTIONS for Sealing the Gaps ..7 SOUND TRAP for Single Doors ..7 SOUND TRAP for Double Doors ..10 SOUND TRAP Components ..11 Head and Jamb Protection ..11 Head and Jamb Optionsfor Other SOUND TRAP SOLUTIONS .

4 13 Meeting Stile Protection ..13 Automatic Door Bottoms ..14 Saddles ..15 Hinges ..15 Application and Installation Considerations ..16 WINDOW AND CURTAIN WALL ..16 VISION LITE SYSTEMS ..17 SOUND SHEET From zero ..17 SOUND DOORLITE Systems ..17 Specifications Section 08380 ..Certifications ..Back CoverBack CoverTHENOISEPROBLEMLoud noise hurts everyone and it's especially bad for business. Continued exposure impairs hearing and undermines emotional well-being, exposing employers to potential liabilities. Even at relatively low levels, unwanted noise can be a costly drain on employee morale and businesses by their nature demand isolation from the intrusive sounds of the outside world.

5 Concert halls and theaters would forfeit their enchantment for audiences subjected to noisy reminders of the external world oflobby and street. Recording studios cannot function with even miniscule SOUND intrusions from the facilities need to shield common workspaces and office employees from the distractions of resident noise emanating from the HVAC plantand other heavy equipment rooms. Virtually all types of commercial buildings need offices equipped for private conversation. And theneed for absolute confidentiality is a modern byproduct of expandingnational security SOLUTIONS to the endless list of noise problems andchallenges fall into two basic categories. The science ofsound acoustics has yielded corresponding SOUND management techniques.

6 Their application is determinedby the nature of the particular noise problem: Absorptionis the process of removing SOUND energy from within a room. Typically, that is accomplished using soft, porous materials exposed to soak up SOUND . Transmissionis the movement of SOUND througha medium. Preventing the transfer of SOUND throughdoor openings specifically through clearances andgaps around doors requires the specialized expertiseand techniques discussed in the following pages. 1 In fact, audible conversation is an inherent problem for all facilities where private communication is important from doctors' offices and hospitals to counseling centers. Noise can be equally unwelcome in settings we don t usually associate with business.

7 Consider the impact of noisy disruptions on the tranquility of services and other functions at churches. Closer to home,where integrated home theater systems are becoming popular, even routinehousehold noise can interfere with listening pleasure. And when you're on theroad, hotel noise often causes a lot of irritation if rooms are not equipped withsound-rated entrance and/ or communicating OF SOUND PRESSURE LEVELS AND LOUDNESS SENSATIONS SOUND Pressure Level(dBA)SourceSensation130 Jet Aircraft at 100' Bass Drum at 3' Physical Pain Auto Horn at 3'120 Thunder, Artillery Nearby Riveter110 Deafening Elevated Train Discotheque100 Loud Street Noise Noisy Factory90 Very Loud Truck Unmuffled Police Whistle80 Cocktail Party Noisy Office Average Street Noise70 Loud Average Radio Average Factory60 Noisy Home Inside General Office50 Moderate Conversation Quiet Radio40 Quiet Home Private Office30 Faint Empty Auditorium Quiet Conversation20

8 Rustle of Leaves10 Whisper Very Faint Soundproof Room 0 Threshold of AudibilityFrequency Distribution of Typical SoundsFREQUENCY IN CYCLES PER SECOND (Hz)5010020050010002000500010000 Bass DrumRinging TelephoneMale VoiceFemale VoiceSpeech PrivacyTruckAuto HornFreight TrainJet AircraftElectric MotorPunch PressFREQUENCY SPREADPEAKINTENSITIES 2 SOUND pressure levels are measured in decibels or dB. The scale of measurement used to simulate SOUND across the audible frequency range is denoted as dBA. Figure 1 illustrates the impact of dramatic changes in dB levels. It is also important to note that the human ear perceives changes in loudness caused by even small changes in those levels.

9 Each 10 dB increase doubles the SOUND reception and the annoyance or discomfort that goes with 1To go from definitions to practical applications , we firstneed to understand how SOUND is transmitted from itssource through a barrier. Next we will explain how abarrier is rated for its ability to inhibit or block gives us the ability to compare different that information, we can examine the role of gasketing systems in optimizing the performance ofdoors that function as SOUND Your Noise Problem: The First Step to Solving It To define your specific problem, you need a basic understanding of how to quantify both your unwanted noise and the SOUND level that will beacceptable.

10 The difference between those two values is the degree of SOUND control you need toachieve with your door opening. That understandingrequires a brief overview of the science of SOUND andits begin with a few important definitions: Soundis vibrations in air moving in waves. The rate of SOUND pulsations measured in cyclesper second is called frequency also known ashertz (Hz). The range of human hearing is considered to be 20 to 20,000 Hz. FREQUENCY DISTRIBUTION CHARTD uration HoursSound LevelPer Dayin dBA89069249539721001-1/210211051/21101/4 or less115 Federal (OSHA) code prohibits exposureto noise levelswhich exceedthese limits:STC values are used to define the performance requirements for achieving a specified reduction in soundtransmission from a source room to a receiving STC rating of an installed door also determines howmuch noise reduction is possible between a given sourceroom and receiving room.