Acoustic and Audio Equipment Reference Materials

Description: Why Voice Matters in AI's Evolution ...

Description: TRANSFORMING QUIET INTO SAFETY -- SOLUTIONS FOR A SECURE ROAD ENVIRONMENT ...

Description: Child Presence Detection (CPD), an important safety measure for children in cars, is a system that uses various sensors to sense children in the car and send a notification warning to the driver. ...

Description: Noise exposure has been associated with adverse cognitive and behavioral outcomes in children, but evidence on longitudinal associations between community noise and child development in low- and ...

Description: Urban noise pollution is an emerging public health concern in growing cities in sub-Saharan Africa (SSA), but the sound environment in SSA cities is understudied. We leveraged a large-scale ...

Description: Because the processing is implemented digitally, a few features are possible that cannot be done in an optical camera ...

Description: Piezoelectric speaker is developed based on the reverse piezo-electrificatio n effect. As a brand new branch of speaker family, its superior high pitch quality, ultra-thin structure, and low power ...

Description: Ultrasonic transducers send and receive waves for many types of sensing. They convert energy into high frequency sound waves in the ultrasonic range. These sound waves are then focused on a target and ...

Description: The "Grammy" is the "Oscar" of the music industry since 1959. In 1994, a "Technical Grammy Award" has also been presented. This goes to people who have made outstanding contributions to the ...

Description: What is a noise map? ...

Description: A measurement-class microphone such as a 0.5 in ICP microphone is typically a sizable part of the cost of a sound-level meter (SLM). That high instrument cost in turn constrains applications such as ...

Description: MEMS microphones, such as those used in the Noise Sentry RT line of integrating sound-level meters, have definite advantages compared to traditional electrostatic microphones ...

Description: Noise curves specify the acoustic ambient noise in an indoor environment. The unoccupied room is measured to produce a single maximum value across the complete sound spectrum. This value is used to ...

Description: This article describes considerations and the implementation of retrofitting a fully-automated procedure, for testing a public address system, into a safety-critical environment (a nuclear power ...

Description: The requirements for acoustic testing are quite unique within the field of audio analysis, and testing requires particular care to ensure good rejection of unwanted reflections (echoes and ...

Description: Audio analysis with dScope Series III using synchronous multi-tones is fast and powerful. It allows many parameters of the equipment under test to be measured simultaneously, using a single stimulus ...

Description: The radio broadcast signal chain is a long and complex path involving electro-acoustic transducers, mixers, storage media, interface channels, signal processing and more. Each process within this path ...

Description: The ability to generate an FM Multiplex (MPX) for stereo FM radio reception testing is made possible by the extended audio bandwidth of the dScope Series III audio analyzer. This application note is ...

Description: dScope Series III Version 1.2x releases feature a set of tools for measuring impulse responses and derived parameters. Impulse response analysis is a powerful tool which can be used to measure ...

Description: The dScope Series III is a powerful and comprehensive audio analyzer platform, designed to give the user a great deal of flexibility in analyzing audio signals and carriers, making the system ideally ...

Description: The habitat of audio converters is ever-changing. Early converters were built into stand-alone digital audio equipment. Later, they were built as stand-alone conversion devices with dedicated digital ...

Description: The Numerically-Identical CD Mystery: A Study in Perception versus Measurement The authors investigate claims that numerically-identical CDs can sound noticeably different on replay. It has been ...

Description: 1 Noise Control Throughout the world, there is renewed effort to control noise levels in residential areas. High noise levels interfere with sleep and various human activities. In the long run it does ...

Description: This application note discusses a technique known as beamforming for determining noise location of passing vehicles. The technique has several challenges including simultaneous acquisition of a large ...

Description: Directives to assess and minimize cabin noise have become a top priority for the aerospace industry. From large commercial jets, to helicopters, to small propeller aircraft the need is the same, which ...

Description: For piezoelectric type audible alarms, the larger the voltage signal applied to the piezoelectric transducer, the louder the sound level. This property can be used to electronically control the sound ...

Description: These days, it seems that we are constantly being alerted with everything from beeps to buzzers. Personal Computers, virtually all types of home appliances, cars, farm implements, golf carts, medical ...

Description: Since entering the acoustics arena in the seventies, we have heard many stories over and over. One of these is that the acoustic foams are no more than a fancy packaged version of egg cartons. After ...

Description: In the Disco Days of the late 1970 s, floor carpet was often used in studios as acoustical wall treatment. Orange shag was a particular favorite. We had an independent lab test Thick Pile Carpet ...

Description: This article was written for the October 2007 issue of Religious Product News. It covers misconceptions about how acoustical materials work and interact with a sound system. Topics include isolation ...

Description: This article was published in the July 2007 issue of Technologies for Worship Magazine. The control room serves to monitor and evaluate the recording and for this reason it is critical that it be ...

Description: This article was written for the November, 1999 issue of ProSoundNews. It traces growth in awareness of acoustics from our first showing anechoic wedge foam at AES New York in 1979 through the ...

Description: This article appeared in the January 2006 issue of Church Production. Churches share the same laws of physics with recording studios and concert halls, but must apply them differently. Achieving a ...

Description: This article form the June 2007 issue of Church Executive discusses ceiling treatments. Reverberation reduction is essential to speech intelligibility. Retaining a proper level of reverberation is ...

Description: This article was written for the Winter 2000 issue of Disc Makers Pro Studio Edition at the request of Keith Hatschek. It was later incorporated into his book The Golden Moment, Recording Secrets from ...

Description: This article from the August 2004 issue of Singer Magazine discusses the noise isolation and sound shaping concerns for studios. Recording environments in large, dedicated facilities as well as ...

Description: This article was written at the suggestion of Custom Retailer for their October 2003 issue. A previous article had implied that room acoustics could be fixed with expensive equalizers. Here it is ...

Description: This was written at the request of Facility Safety Management for their December 2005 issue. Noise control is essential to hearing preservation and speech intelligibility in safety systems. Heavy mass ...

Description: This series article was written in 2007 for Disc Makers Pro Studio Edition e-Newsletter. It illustrates what can be done to create a professional working environment for recording in residential ...

Description: This article was written for the March - April 2003 issue of Your Church. It describes the construction, function and uses of various acoustical sound absorbing panels starting with the fabric covered ...

Description: This article was written for the April 2005 issue of Singer Magazine (now Singer & Musician) by their publisher and Editor-in-chief Robert A. Lindquist. Acoustics First provided construction ...

Description: This article is the second part of a series written for the June 2005 issue of Singer Magazine, now Singer & Musician, by their publisher and Editor-in-chief Robert A. Lindquist. This final ...

Description: This profile of Acoustics first appeared in the September 2005 issue of Your Church Magazine. It describes how the company can provide a basic analysis of the sound of a sanctuary, multipurpose room ...

Description: This article was written for the September 2008 issue of Radio World and reprinted in their 2009 Sourcebook. Moving from a world class recording facility, where noise control and acoustics were ...

Description: This article was written for the February 2002 issue of Home Toys. Listener may hear sounds not on a record. Recording engineers can trick the ear into hearing sounds beyond what is recorded. The room ...

Description: We're often asked what is the difference between free field microphones, diffuse field microphones and pressure microphones. For a run-of-the-mill 1/2" inch microphone the short answer is nothing. ...

Description: Sometimes we are asked about the differences between an acoustic camera and a sound intensity probe and which of the two is better for a particular application. There is no straightforward answer as ...

Description: Just about any mariner knows the power and appeal of the open air and salty sea. It's a phenomenon that goes back long before mankind even dreamed of mechanical flight. Yet, despite his long-term ...

Description: Audible devices are playing an increasingly critical role in modern healthcare. Unfortunately, device manufacturers may not be aware of all the options available to them when it comes to sound ...

Description: This document applies to Si4702/03-C Firmware 19 and greater. Worldwide FM band support (76-108 MHz). Digital low-IF receiver. Frequency synthesizer with integrated VCO. Seek tuning. Automatic ...

Description: Edwin H. Armstrong, known as one of the founding fathers of radio technology, invented the superheterodyne radio receiver in 1918 and frequency modulation (FM) in 1933 [1]. These two concepts, along ...