Larson Davis, Inc., A PCB Group Co.    Provo, UT 84601
May 02, 2013 SoundExpert™ LxT Sound Level Meter is rugged device that measures noise for pass/fail assessments and gathers data for up to 2 wk using battery power. Graphic display and firmware are included, while in kit form, product also includes protective case, D-cell battery pack, microphone protection shroud, and cable options from 6–200 ft. Free field or random incidence microphones are also available. Product suits construction, mining, wind farm, and public venue applications.

PCB Piezotronics Inc.    Depew, NY 14043 2495
Apr 01, 2013 Designed for applications with frequency up to 100 kHz and amplitude up to 174 dB, Model 377A14 Side Vented ¼ in. Condenser Microphone is suited for testing of panels, airplane wing testing, HVAC, sound absorption in impedance tube tests, or sound/noise measurements in cavities or small enclosures. Side vented design provides accuracy when microphone is flush mounted in wall or tube where there are significant pressure differentials between inside and outside.

Transducers USA    Elk Grove Village, IL 60007
Dec 21, 2012 Offering dust- and water-tight design for outdoor use, KECG2742 Omnidirectional Microphone features operating voltage of 2.0 Vdc at 100–20,000 KHz and temperature range of -20 to +70°C. Unit can be teamed with IP67-rated KPEG267 Speaker, which can operate submerged in up to 3 ft of water with sound output of 85 dB at continuous tone frequency of 5.0 KHz at 6–14 Vdc. Smaller IP67-rated TRKPE-243 Speaker, housed in 14.0 x 9.5 mm package, generates 80 dB with continuous tone of 5.0 KHz at 9–16 Vdc.

PCB Piezotronics Inc.    Depew, NY 14043 2495
Sep 10, 2012 Consisting of microphone and preamplifier combinations, ¼ in. Models 378C01 and 378C10 measure frequencies to 100 kHz and amplitude to 165 dB. Free-Field Model 378C01 is suitable for automotive and aerospace noise source location and array applications, while Pressure Response Model 378C10 is typically used in noise absorption applications within impedance tubes, or general noise testing in cavities or small enclosures. Both are powered by 2-20 mA signal conditioner and standard coaxial cables.

STMicroelectronics    Lexington, MA 02421
Jun 20, 2012 Suitable for assembly on flat-cable PCBs in space-constrained consumer devices, MEMS Microphones in 2 x 2 mm plastic packaging allow manufacturers to place sound hole on top or bottom of package to ensure shortest acoustic path from environment. Microphones integrate internal shielding cage for electromagnetic immunity and are compatible with surface mount assembly machinery and pick-and-place equipment. Applications include mobile phones, laptops, tablets, and noise-cancelling headphones.

ClearOne Communications, Inc.    Salt Lake City, UT 84119
Jun 20, 2012 With 24 microphone elements and Acoustic Echo Cancellation technology, Beamforming Microphone Array can steer pickup pattern towards participants in room and reject unwanted noise and reflections, offering solution for group conferencing environments. Adaptive steering automatically adjusts acoustic parameters and beams dynamically based on mounting orientation. Powered using PoE technology, array can be configured to operate in mono or stereo mode for diverse applications.

Pepperl + Fuchs, Inc.    Twinsburg, OH 44087 2245
May 24, 2012 Measuring 31 x 11 x 23 mm, F77 Series is insensitive to color, provides reliable clear object detection, and ignores target holes and ridges. IP67-rated products provide up to 50 Hz switching frequency and operate from -14 to +158°F. With 2 Hz/mm max resolution sensors exhibit acoustic interference immunity; provide one PNP, NO, or NC switch point output; and use discrete PLC inputs. Diffuse, retroreflective, and thru-beam models offer respective ranges up to 400, 400, and 800 mm.

SAW instruments GmbH    Bonn D-53177  Germany
Dec 09, 2011 Able to expand capabilities for studying real-time kinetics on surfaces of live mammalian cells, sam®X sensor uses surface acoustic wave technology and does not require any fluorescent labeling. Each of 8 channels can be utilized independently (8 x 1) or via sequential combinations of 4 x 2, 2 x 4, or 1 x 8 channels to optimize workflow; discrete or common reagents can be delivered to particular sensor chip positions. Analysis takes place in minutes.

STMicroelectronics    Lexington, MA 02421
Nov 02, 2011 Housed in 3 x 4 x 1 mm package, Model MP34DT01 combines top-port sound-inlet position with SNR of 63 dB and flat frequency response in full audio band of 20-20,000 Hz. In multiple-microphone applications, device enables active noise and echo cancelling as well as beam-forming, which isolates sound and its location. Applications include speech-recognition systems for voice-controlled software and electronic-assistant applications, as well as sound level meters that require high dynamic range.

PCB Piezotronics Inc.    Depew, NY 14043 2495
Aug 03, 2011 Combining condenser microphone and preamplifier, Model HT378B02 helps overcome high temperature testing challenges associated with acoustic measurements in environmental chambers or other high temperature applications. Unit is used by test engineers to measure sound pressure amplitude and perform frequency analysis to minimize noise, identify resonance frequencies, and preserve human hearing. Typical applications include automotive engine testing, aerospace engine tests, and pump analysis.

PCB Piezotronics Inc.    Depew, NY 14043 2495
Jun 20, 2011 Operating over 20 Hz to 20 kHz range, models 130E20, 130E21, and 130E22 have similar specifications but are respectively differentiated by BNC, 10-32, and SMB connectors. All models have electret designs and operate on free-field response type, which compensates for their own presence in sound field. Sensitivity is 45 mV/Pa, with noise dloor rating of 30 dBA, and sound pressure level measurement is rated up to 122 dB. TEDS v1.0 lets user locate specific microphone within large group.

Crestron Electronics, Inc.    Rockleigh, NJ 07647
Jun 17, 2011 Available with 1 or 2 microphones, FreeSpeech(TM) system leverages RF/IR wireless technology to add amplified speech audio reinforcement as part of complete classroom media presentation system. Hands-free microphone can be clipped to lapel, hung around neck, or placed in tabletop stand, and built-in 30 W stereo amplifier provides everything needed to drive set of speakers. It also allows for connection of DVD player, computer, or other audio sources.

Marshall Electronics    El Segundo, CA 90245
May 03, 2011 Suited for those requiring retro sound during digital recording, UR-1 microphone combines classic, mellow sound of ribbon microphone and integrates it with USB technology. Electrical circuitry matches input requirements of ADCs and USB output with low-noise and high dynamic range. Focused in all-metal body with double-shielded grill, microphone can be used for recording singing, voiceovers, and podcasts. Volume control and headphone jack allow real-time monitoring without any latency.

Analog Devices, Inc.    Norwood, MA 02062-9106
Jan 25, 2011 Offering plug-and-play compatibility for non-handset applications, ADMP441 iMEMS® microphone delivers 24-bit data with industry-standard I²S (Inter-IC Sound) digital interface. SNR of 61 dBA promotes sound quality and intelligibility in far-field applications, while flat frequency response from 100 Hz to 15 kHz produces balanced and natural sound. Also, PSRR of 80 dBFS delivers RF and electrical noise rejection to allow design flexibility for placement and power trace routing.

Meggitt Sensing Systems (Endevco Corp.)    San Juan Capistrano, CA 92675
Jan 20, 2011 As combined ½ in. free-field pressure microphone and iTEDS enabled preamplifier (per IEEE 1451.4) set, Endevco® model EM46AE is designed for general-purpose and larger channel count precision acoustic measurements. Condenser microphone and preamplifier are both constructed of stainless steel and calibrated together. With frequency response from 3.15 Hz to 20 kHz and dynamic range of 14 dBA to 135 dB, set is designed according to IEC 61094 Class 1 standard guidelines.

Continental    Allentown, PA 18106
Nov 30, 2010 Crash Impact Sound Sensor improves vehicle occupant protection by using structure-borne noise generated during frontal and side-impact collisions to determine how airbags deploy. Analyzing and evaluating collision within milliseconds, algorithms relay data about crash event to vehicle's restraints control module so airbags and pre-tensioners can be fired with proper force at timing. Side-mounted pSAT sensors detect pressure changes in door cavity using entire side door as sensing area.

Transducers USA    Elk Grove Village, IL 60007
Nov 03, 2010 Measuring 6.02 x 2.7 mm, Model KECG2742 is omni-directional with response frequency of 100-20,000 Hz at low signal to noise response of 60 dBA. Output impedance is 2.2 kW at 2.0 Vdc/0.5 mA within temperature range of -20 to +70°C. Fully compliant with IP-57, IEC Standard v2.0, electret condenser microphone is housed in aluminum and suitable as adjunct for mobile radios, transceivers, or any equipment operating in harsh environmental conditions.

Wolfson Microelectronics plc    Edinburgh EH11 2QB  United Kingdom
Nov 02, 2010 Based on CMOS/MEMS membrane technology, Models WM7210 and WM7220 incorporate ADC, which outputs single-bit pulse density modulated format audio data stream. Output can be defined for left or right configuration, allowing for applications requiring stereo operation. Available in 4 x 3 x 1 mm and 4.72 x 3.76 x 1.25 mm packages, respectively, Models WM7210 and WM7220 are suited for mobile phones, PCs, portable media players, digital still cameras, and navigation devices.

Meggitt Sensing Systems (Endevco Corp.)    San Juan Capistrano, CA 92675
Oct 27, 2010 Incorporating SMB connector for integration with DAQ systems, Endevco® Model EM40PH features 50 mV/Pa sensitivity and dynamic range up to 135 dB, while Model EM40PL offers sensitivity of 10 mV/Pa and dynamic range up to 150 dB. Free-field pre-polarized microphones are designed for multi-channel acoustic measurements of sound power, sound pressure levels and frequencies, and sound-field analyses. Incorporation of TEDS technology allows microphones to be recognized by TEDS compatible input modules.

G.R.A.S. Sound & Vibration A/S    Holte DK-2840  Denmark
Sep 23, 2010 Assembled in dust-free environment to avoid contamination, Type 46 Microphone Sets are available in ¼ and ½ in. diameters and in free-field, pressure, and random incidence versions. Sets are calibrated together as single units and are sealed with removable label for integration into single- and multi-channel applications. Supporting constant current power and 7-pin LEMO inputs, microphones utilize 114 dB sound calibrator as sound source for frequent verification of measurement chain.