A microphone is a transducer that converts the acoustic pressure generated by sound waves into electrical signals. It usually is housed in a quarter- or half-inch tube equipped with a cable.
Microphones are present within telephones as voice transducers, and also are used in the realm of acoustic measuring. Sound-level meters use microphones to record noise levels. Measurement microphones are distinguished by operational setting, i.e., for interior (diffuse field) or exterior (free field) use.
Electrostatic microphones are more sensitive than coil microphones and function in a wider frequency range. They use a condenser whose capacity varies with the membrane's movement. A power supply is necessary to polarize the condenser and pre-amplify the output signal. If the condenser is pre-polarized, the microphone is an electret microphone. In this case the power supply can be phantom, using a three-wire connection (or a two-wire with a battery). The electret's polarization declines over time.
Sound pressure microphones are omni-directional. Pressure gradient models are directional. Parabolic reflector microphones are extremely directional. Other common types include piezoelectric, MEMS-type (with a diaphragm etched into a silicon chip) and hydrophones.
The directivity diagram, the mV/Pa sensitivity, bandwidth, signal and construction quality are essential elements to consider.
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Surface microphone 11.2 mV/Pa, 30 - 140 dB | 4949 Bruel and Kjaer
Type 4949 is designed for measurement of the true surface pressure, especially in automotive applications. It is exceptionally well-suited for mounting directly on the car...
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Outdoor microphone max. 146 dB | HD WME Delta Ohm
The HD WME microphone unit is suitable for long lasting outdoor monitoring, even h a fixed (fiattended...
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The plug-on measurement microphone M4260 is 48 VDC phantom powered and includes the pre-amplifier and an electronic data sheet. The M2210 combines a high dynamic range and wide frequency range with low noise. - 1/4”...
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1/2" prepolarized condenser microphone with built-in preamplifier 50 mV/Pa | MX025 CESVA
The MX025 is a unit which comprises a preamplifier fed by a constant current ICP® (PA-25) + microphone (C-250). The CESVA PA-25 is fed by 2-20 mA of constant current. The PA-25 has...
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Ultrasonic directional microphone for the location of partial discharge LDA-5/S Doble Lemke
Ultrasonic PD Sensor LDA-5/S used for PD detection during in-service inspection of high voltage (HV) equipment Applications Detection of partial discharges (PD) for in-service...
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The Endevco microphone model EM40AD is a ½-inch precision condenser microphone for general purpose acoustic measurements, e.g. in couplers, boundaries and in enclosures; it can also be used as a random-incidence microphone. It is a prepolarized pressure microphone with a large dynamic range and a wide...
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Speaker-microphone Ex-TRA 80* Aurelis ecom instruments
The Ex-TRA 80* Aurelis series is the first audio accessory,...
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Designed to cancel out 90% of back ground noise Standard 6 foot coiled...
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Measurement microphone 20 Hz - 20 kHz | MI-1234, MI-1631 Onosokki
The MI-1234 uses a titanium diaphragm and not only maintains high stability but also is designed specially to realize flat frequency responce over a wide bandwidth. Frequency Range 20 Hz to 20 kHz Responce Type Free Field...
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Measurement microphone -21 - -38 V/Pa | UC series RION Co., Ltd
In ordinary measurements, the placement of the microphone has an impact on sound pressure at the measurement point at high frequencies. Sound field microphones...
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Array microphone 10 - 50 mV/Pa, TEDS | 40PH, 40PL G.R.A.S. Sound & Vibration
Array microphones are used in situations where concurrent measurements are required at several points. For example in the analyses of: * Sound fields * Sound power * Transients They are also of particular value when measurement...
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1/2" prepolarized condenser free-field microphone 50 mV/Pa, 15 – 146 dB | Model 377B02 Larson Davis
Model 377B02 is recommended for high accuracy applications where high sensitivity is required for free-field response type measurements When a freely propagating sound wave encounters an object in its path, the wave will either, be reflected, absorbed or transmitted depending on the material properties and size of the object as well...
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Piezoelectric microphone 20 nC/bar | M/01 DJB INSTRUMENTS
High sensitivity dynamic pressure transducers, finding application for high intensity acoustic, turbulence, and cavitation measurements, particularly where these phenomena may be superimposed upon high static...
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The VAP30 is a heavy-duty indoor microphone unit designed to allow public address/paging system. The VAP30 can be supplied certified to provide safe operation in potentially explosive atmospheres...
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Analog MEMS microphone Wolfson Microelectronics
DESCRIPTION The WM7110 is a compact high Signal to Noise ratio silicon analogue microphone for use in consumer applications requiring low power consumption, typically...
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Digital MEMS microphone 1x1 mm | AKU2002C Akustica
The AKU2002C/CH is a top-port digital-output microphone that integrates an acoustic transducer, analog output amplifier, and sigma-delta modulator on a single chip. With an industry standard 3.76mm x 4.72mm footprint, the AKU2002C/CH has been designed with enhanced robustness for improved...
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Measurement microphone 22 mV/Pa, 200 kHz | 7052PH Type 1.5™ ACO Pacific, Inc.
The 7052PH Type 1.5TM phantom powered measurement microphone system offers a cost effective solution to acoustic measurements from phantom powered sources. Designed to work with from 48 to 18 Vdc Phantom...
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Speaker-microphone C-C500 Savox
SAVOX® C-C500 is a remote speaker microphone (lapel mic) that can be used with or without a headset. As a communication solution, it provides various optional...
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CME-1538-100LB 4.0 mm Electret Condenser Microphone, Omnidirectional, Wire Leads, 2.0 Vdc, IP67 CMR-2747PB-A 6.0 mm Electret Condenser Microphone, Noise Cancelling, PC Mount, 2.0 Vdc CMR-5054TB-A 6.0 mm Electret Condenser Microphone, Noise Cancelling, Terminal Mount, 2.0 Vdc CMC-2742WBL-25L 6.0 mm Electret Condenser Microphone, Omnidirectional, Lead Wires,...
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Outdoor microphone 50 mV/Pa, 156 dB | Nor1210 series Norsonic AS
The outdoor microphone are designed for permanent installation in the field, for example airport noise monitoring or industrial plant noise monitoring. It includes anti-bird spikes, a windscreen and a rain cover, all of which are integral parts of the acoustic omnidirectional characteristics offered by the system. The rain cover contains an electrostatic actuator...
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Fiber optic microphone MR350 Micronor
Productdescribtion: Miniature fiber optical microphone for remote monitoring of vibration in medium and large structures....
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Microphone 2.2 KΩ | F-M-O4.0-44SMD DIGISOUND-Electronic
Impedanz / Impedance (Ώ) at 1kHz 32 +/-1,6 Nennleistung / Rated Power (W) 0,15 Max....
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Measurement microphone MI 17, RG 50/20, MU-10, MP41 ROGA-Instruments
You will find here measurement microphones...
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Ultrasonic directional microphone for the location of partial discharge May Elektronik
Usable under live conditions, no need to shut down Integrated laser pointer to...
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Acoustic sensor for grinder AE Balance Systems srl
Features: Standalone type for external mount on the case of the machine. Cylindrical or ring type with no-contact collector for external mount on...
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Acoustic sensor SITRANS DA400 SIEMENS Sensors and Communication
SITRANS DA400 for continuous monitoring of oscillating positive displacement pumps. The diagnostic system detects even tiny leaks in the delivery valves. As a result, defects can be detected...
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Piezoelectric acoustic sensor for machine monitoring 2 000 g | 8152B111 KISTLER
Characteristics High Sensitivity and wide frequency range, inherent highpass characteristic, robust,...
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Acoustic level and volume sensor for high temperature solids BinMaster
The 3DLevelScanner HT is designed to measure the level and estimate the volume in storage silos containing challenging materials such as clinker, alumina, frac sand and fly ash. This model of the 3DLevelScanner has an operating temperature range of up to 356°F (180°C) to accommodate higher temperatures that may...
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The Volcan is APM's newest product. It was designed to take the unique abilities of the 3DLevelScanner product family, high accuracy in dusty environments and self cleaning, to the ESP hoppers. ESPs, or Electro-Static Precipitators, are air cleaning systems used to remove fly ash particles from the flue gas, the gas coming out of a coal burning and other burning processes designed to create significant...
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Acoustic sensor for grinder MARPOSS
Using acoustic technology to detect subtle changes in the sounds produced during grinding,...
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SinapTec is the exclusive distributor for ITC transducers in France. Since the company...
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Acoustic sensor 600 psi, 600 pC/psi | 2180C DYTRAN INSTRUMENTS
Item: HIGH INTENSITY ACOUSTIC SENSOR Description: 600...
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Acoustic sensor 100 - 1 000 kHz Physical Acoustics
Wideband sensors are typically used in research applications or other applications where a high fidelity AE response is required.�In research applications, wideband AE sensors...
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Acoustic level sensor Gill Sensors
Solid-state level switch for granules, grain, powder, dust and other dry bulk materials. Particularly suited to agricultural and industrial...
