Reference Articles 1 - 71 of 71
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Effects Linked To Noise Exposure
Description: Employees exposed to excessive in-plant industrial noise may be at risk to suffer a variety of physiological and psychological consequences. Other intangible effects have also been hypothesized to be ...
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Characterizing Cabin Noise
From: PCB Piezotronics, Inc.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 ...
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Do You Hear That?
From: Mouser Electronics, Inc.Description: Audio. It's hard to imagine a world without sound. It's amazing how much sound enhances our viewing experience. In the U.S. alone, the average home has 2.9 television sets, with 56% owning at least ...
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Controlling Sound Level- Electronic Method
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 ...
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Controlling Sound Level- Mechanical Method
Description: There are two ways to control sound level in an electronic audible alarm. One is mechanical and the other is electrical. The mechanical method involves changing the size of the front hole opening of ...
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Designing an Automotive Instrument Cluster for Increased Sound Pressure Level
From: Star Micronics AmericaDescription: Nearly all vehicles have a chime or speaker on the dashboard instrument cluster for various alert functions. Increasingly, instrument cluster manufacturers are turning to speakers that produce ...
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Acoustic Myths & Realities: The Egg Carton Test
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 ...
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Acoustic Myths and Realities: Carpet on the Wall
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 ...
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Acoustical Myths and Realities (.pdf)
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 ...
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Acoustics for the Church Studio (.pdf)
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 ...
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Acoustics Then and Now (.pdf)
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 ...
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An Acoustical Balancing Act (.pdf)
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 ...
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Churches Should be Mindful of Sound Control from Above (.pdf)
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 ...
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Cost-Effective Acoustical Treatments for your Home Studio (.pdf)
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 ...
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Creating a Home Recording Environment (.pdf)
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 ...
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Don't Correct the Room, Build It Right (.pdf)
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 ...
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From Start to Finish - Safe and Sound Acoustics (.pdf)
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 ...
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Home Project Studio (A Four Part Series) (.pdf)
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 ...
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POP Art - There's More to Acoustics than the "Plain Old Panel" (.pdf)
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 ...
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Project Studio Project, Part One (.pdf)
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 ...
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Project Studio Project, Part Two (.pdf)
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 ...
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Sound Advice for Churches (.pdf)
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 ...
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Studio Acoustics 101: It's the Room (.pdf)
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 ...
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Tales from the Input Side (.pdf)
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 ...
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What is the Difference Between Microphone Types?
From: Prosig USA, Inc.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. ...
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Comparison Between Sound Intensity Probes and Acoustic Cameras
From: Prosig USA, Inc.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 ...
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S-Cube™: Generic Controller for Active Acoustics (.pdf)
From: Silentium Ltd.Description: Silentium developed a generic controller for active acoustics, i.e. Active Noise control (ANC), Active Structural Acoustic Control (ASAC) and Active Vibration Control (AVC). Silentium offers a range ...
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Finding Safe Harbor for Electronic Sounding Devices (.pdf)
From: Challenge ElectronicsDescription: 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 ...
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Perspectives On Miniaturization (Part II)
From: Challenge ElectronicsDescription: In last month's Perspectives, the experiences of industry experts in facing the challenges of miniaturization of medical devices and their components was shared. Due to the overwhelming response to ...
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Practicing Sound Medicine
From: Challenge ElectronicsDescription: 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 ...
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Measurement Microphone Handbook
From: PCB Piezotronics, Inc.Description: Want to learn the basics of acoustic transducers like 'what is the difference between Free Field & Diffuse Field'? Download the new PCB Measurement Microphone Handbook to find out what you need to ...
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Sonar Listens to Material Properties
From: COMSOL, Inc.Description: During WWII, SONAR was used primarily to detect submarines; today these techniques are used to look for undersea objects such as shipwrecks and for measuring fish abundances and distributions. SONAR ...
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Scanning an Ultra-light Membrane to Image Acoustic Fields (.pdf)
From: Polytec, Inc.Description: Researchers at the INSA Laboratory in Villeurbanne (France) are currently developing a new measurement device to obtain acoustic particle velocity maps from laser measurements. The technology is based ...
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Boeing Uses LMS SYSNOISE to Predict Acoustics of Aircraft Cabins
From: LMS InternationalDescription: Boeing uses acoustic models coupled to structural methods to predict low-frequency noise caused by engine vibration and other sources. Jim Johnescu, Senior Specialist Engineer for Boeing Commercial ...
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Boundary Element Acoustics
From: LMS InternationalDescription: When it comes to acoustics and virtual design simulation, there are two primary methods: the Boundary Element Method or BEM and the Finite Element Method or FEM. Both methods are available within ...
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Building a Robust Path for Virtual Wind Turbine Design
From: LMS InternationalDescription: The large physical size and characteristic acoustic radiation of wind turbines make it a real challenge to accurately simulate wind turbine acoustics early in development. A leading wind turbine ...
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An Integrated Approach to Engine Radiated Acoustics
From: LMS InternationalDescription: LMS Virtual.Lab engine radiated acoustics has been a focus of LMS for a long time. LMS has developed specific techniques such as Mesh Coarsening and Acoustic Transfer Vectors (ATVs) to speed up and ...
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Accelerating Structural and Vibro-Acoustic Simulation Through Wave Based Substructuring
From: LMS InternationalDescription: Built on top of the LMS Virtual.Lab Structures solutions for component, subsystem and full vehicle modeling, analysis, and post-processing, LMS Virtual.Lab Wave Based Substructuring (WBS) brings ...
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Noise Control: A Proactive Approach at the Polaris Amphitheater
From: Signalysis, Inc.Description: It's no surprise that the number of noise complaints has risen with the recent growth in amphitheater construction. Throughout the country, communities are adopting tougher noise control ordinances ...
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When to Choose the Directional or Noise Canceling Microphone?
Description: The main difference of the appearance between the directional/ noise canceling and the omni-directional microphone is that the former one has air holes on the bottom. The air holes also receive sound, ...
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The sound which microphone received is too low
Description: Normally, the higher the impedance is, the better the sensitivity will be. However if the impedance is too high to get enough voltage/current, the high frequency response may get worse. Input higher ...
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The sound which microphone received is too low
Description: Normally, the higher the impedance is, the better the sensitivity will be. However if the impedance is too high to get enough voltage/current, the high frequency response may get worse. Input higher ...
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Broadcast FM Radio Tuner for Portable Applications
From: Silicon LabsDescription: 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 ...
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Frequency Modulation (FM) Tutorial
From: Silicon LabsDescription: 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 ...
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Omnidirectional and Unidirectional Microphone
Description: Imagining that a microphone is set in the center of a sphere, and the sound is generated on the surface of the sphere. Because the sound waves are diffused and diffractive, the SPL which the ...
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The Difference Between the Speaker and the Receiver
Description: The basic structure of the speaker and the receiver is almost the same; the diaphragm generates the sound by the reaction upon the sound coil and magnet. ...
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How To Choose A Buzzer
Description: There are many different kinds of buzzer to choose, first we need to know a few parameters, such as voltage, current, drive method, dimension, mounting type, and the most important thing is how much ...
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Optimization of Polarity Weighted Quasi-Slanted IDTs
Description: This paper is devoted to optimization of quasi-slanted interdigital transducers (IDT) [1] that have some advantages over classical fan-shaped IDTs [2] if few channels are used. Objects under ...
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Piezo Buzzer & Magnetic Buzzer
Description: A piezo buzzer generates sound because of the piezoelectric effect from the piezoelectric ceramic which drives the metallic diaphragm to vibrate. A magnetic buzzer is based on the electromagnetic ...
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Test condition makes the impact on the sensitivity of microphone
Description: Generally speaking, the sensitivity of the microphone will increase when we raise the impedance at 2.2K of RL, the results as the graph 1 & 2. The sensitivity also rises if we give higher voltage to ...
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The Difference Between The Self-Drive And External-Drive Buzzers
Description: Depend on the driving signal, the buzzer divide into self drive and external drive. However inner circuit/ no circuit, DC/ AC, and active/ passive are all mean the same. ...
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The Reason That Speakers Emit Noise
Description: To analyze the usage, there are a few reasons explain why the speakers emit buzz sound or noise: ...
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Microphone Array
Description: With the constant enlargement of the internet bandwidth, the internet video conference has become possible. However, the wide bandwidth does not mean high quality of sound. The consumers usually need ...
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The Key Point of Soldering and Assembling The Microphone
Description: The diaphragm of the microphone is a very thin mylar membrane, it is easily being contracted and distorted with the high temperature. Therefore, we can only use hand-welded method to process, and the ...
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About waterproof speaker
Description: Generally speaking, a paper diaphragm speaker is easily to have the problem of molding or distortion in a humid environment, and is certainly damaged in the water. On the other hand, the mylar ...
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The Advantages of the Electret Condenser Microphone
Description: Transform sound into electric signal- The best design in theory: The design of electret condenser microphones is based on the theorem that we use charging and discharging motion. ...
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The Buzzer has Noise
Description: When the sound which the buzzer generates is not a clear beep sound, we call it noise or broken sound. There are two possible ways to cause the noise. ...
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The Relationship between Watt and SPL
Description: Base on the premise that all the conditions are the same, if the drive circuit provides enough voltage, the speaker can generate higher sound pressure level. However, with the same voltage, but we use ...
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What Should I Do To the Noise?
Description: If the direct current mix with the alternating current signal, we will hear a stable level, low frequency and continual noise. We can lead the power to the microphone directly, or set a non-join ...
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The Way to Drive a Buzzer
Description: For a self- drive buzzer ( DC/ circuit- built), either pizeo or magnetic just apply the rated current and voltage. ...
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Small Size Speaker but Generate Higher SPL
Description: n order to increase sound pressure level, we need to vibrate more air molecule by more power under unit time. For the two sizes speakers, the area of diaphragms of the 15mm speakers are around 176mm ...
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Basic Vocabulary in Acoustics
Description: The physical character of sound Sound: The pressure wave which is vibrated in the elastic medium. Wave: The presentation of passing the energy from one place to another place. ...
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The Advantages of the Rubber Holder
Description: Microphone is a component to receive the sound, therefore it is possible to receive any other sound which happens near the microphone at the same time, for instant, when we touch the casing; or the ...
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Speaker Size and Sound Pressure Level
Description: In order to increase sound pressure level, we need to vibrate more air molecule by more power under unit time. For the two sizes speakers, the area of diaphragms of the 15mm speakers are around 176mm ...
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Crystal Terms Glossary
Description: APP. NOTE 3 S TSU FREQUENCY CONTROL, INC. CRYSTAL GLOSSARY Aging The relative frequency change over a certain period of time and is typically expressed as a maximum value in parts per million per year ...
- Frequency Control Devices
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Oscillator Terms Glossary
Description: APP. NOTE 2 S TSU FREQUENCY CONTROL, INC. OSCILLATOR GLOSSARY Aging The slow change of a frequency with time, if all other influences are held constant. The primary causes are mass transfer and stress ...
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Frequency Forms Measurement
From: Mahr Federal Inc.Description: Understanding the role frequency plays in the measurement process and why it needs to be specified on part prints is critical to making reliable quality checks on manufactured parts. ...
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Improved Electronics in Medical Devices Leads to Better Patient Care
From: Star Micronics AmericaDescription: The medical profession has not been immune to the emergence of wireless technology. Like most professionals, doctors, nurses, and medical specialists are becoming more reliant on wireless devices such ...
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Selecting Proper Audio Components for Medical Electronics
From: Star Micronics America
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Guidelines for Specifying Underwater Electroacoustic Transducers
Description: This paper describes fundamental principles and practical guidelines for specifying or electing underwater transducers. Underwater transducers provide the essential link between the power amplifiers ...
