Listen Inc
Listen, Incorporated specializes in PC-based test and measurement systems used for production testing and research and development of electroacoustic products including loudspeakers, microphones, hearing aids, communication headsets, analog and digital telephones, cell phones, and voice over Internet protocol (VoIP) phones.
- (617) 556-4104
- 617-556-4145
- sales@listeninc.com
- 580 Harrison Ave.
Suite 3W
Boston, MA 02118
United States of America
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Known impedance for use in loudspeaker measurements
Impedance Box
An impedance box is necessary for measuring the impedance of a loudspeaker. Listen Inc.’s impedance box contains a 0.25Ω resistance. This value is suitable for most loudspeakers, but may be easily swapped out for a different value by the user if speakers with a particularly high or low impedance are being tested. It is available with either XLR or 1/4″ balanced connectors. Please specify type of connectors when ordering.
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Audio Interfaces
Lynx
Lynx offers a range of audio interfaces that work well with SoundCheck. Listen supplies Lynx interfaces fully tested and pre-calibrated for use with SoundCheck.
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USB Controlled High Precision Audio Test Interface
AudioConnect 4×4
AudioConnect 4×4 is a high accuracy 4-in, 4-out audio interface specifically audio test and measurement. It offers digital and analog audio in and out at any user-specified sampling rate up to 200kHz, and a high signal to noise ratio and wide frequency response, making it suitable for the most demanding measurement applications. Controls are simple – a single USB connection and a power indicator – all other typical soundcard controls that are not used for audio test applications have been eliminated to make operation and calibration simple with no room for error. AudioConnect 4×4 is supplied fully calibrated.
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The SoundCheck Amplifier
SCAmp Audio Test Amplifier
SC Amp is the world’s only dedicated audio test amplifier. Specifically designed for the audio test market, it incorporates several features unique to the needs of audio test and measurement, and unnecessary features found in regular audio amplifiers have been eliminated to keep production line operation simple and error-proof.
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2 Channel Microphone Power Supply and Conditioning Amplifier
SoundConnect 2 mic power supply
SoundConnect 2 is a rugged 2-channel USB controlled microphone power supply and conditioning amplifier.
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Bluetooth Measurement Interface
BTC-4148
The Portland Tool & Die BTC-4148 is a complete interface for measuring and characterizing Bluetooth audio devices including handsets, headsets, speakers, car kits and other devices with Bluetooth audio input or output.
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Audio Interfaces
RME
RME offers a range of multichannel audio interfaces that work well with SoundCheck. Listen supplies RME interfaces fully tested and pre-calibrated for use with SoundCheck.
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Overview of features and functionality
NoiseCheck Software
NoiseCheck is essentially SoundCheck without a stimulus editor, as it is designed for manufacturing the noise made by your product. It is a powerful piece of software, ideal for both R&D and production line acoustic measurements of fans, blowers, motors, gears, bearings, pumps and other electromechanical products.
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Production Line Acoustic Test Chamber
PLATC
The Production Line Acoustic Test Chamber from GRAS is designed for quick and qualified acoustic test of cell phones, tablet PCs, Bluetooth speaker systems etc., including frequency response, THD, Rub & Buzz and microphone test using optional sound source. The chamber has a number of connections for injecting test and control signals to the test object (DUT).Benefits include:Repeatable testing and reliable dataEasy open/close for quick and safe change of DUTFlexible test jig for easy adjustment to new DUTFlexible microphone mounting for both front/backside speakers as well as edge-mounted speakersHigh quality, high sensitive 1/4” CCP measurementmicrophone included (G.R.A.S. 46BL)Individually calibrated frequency response** Compared to reference measurement in anechoic room
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Single Channel Microphone Power Supply
SoundConnect Microphone Power Supply
SoundConnect is a cost-effective, single-channel microphone power supply for audio test applications.
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Microphone Interfaces
MEMS
Listen offers 2 MEMS digital microphone measurement interfaces from Portland Tool & Die, the laboratory-grade DCC-1448 and the low cost PQC-3048 for production line use.
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USB Controlled Loudspeaker & Microphone Test Interface
AmpConnect™ ISC
AmpConnect ISC is an all-in-one audio interface that simplifies your test setup and operation. It is a single, rugged, rack-mountable piece of hardware containing a high-accuracy audio interface, impedance box, amplifier, headphone amplifier, 2 microphone power supplies and digital I/O. It replaces multiple hardware devices, connecting to your computer via a single USB cable, and it is fully controlled by SoundCheck. This simplifies setup and calibration, eliminates cabling and reduces connectivity errors, as well as reducing overall system cost.
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Measurement Microphones
SCM
The SCM measurement microphone is a robust, free- field microphone designed for the rigorous environment of a production line without compromising the accuracy, precision, and stability required for R&D.
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Digital Serial Data Audio Interface
PIO-9216
For accurate testing of devices that use the I2S, Left Justified, Right Justified and TDM audio data formats.
