Special microphones

Special microphones

Special microphones are often required for applications where there are particular requirements surrounding the methods of measurements and configurations.
  1. 40PH Free-Field Array Mic
    Freq range: 10 Hz to 50 kHz
    Dyn range: 32 dB(A) to135 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40PH CCP Free-field Array Microphone

    The G.R.A.S. Array Microphone Type 40PH is a low-cost microphone for general purpose measurements in arrays and matrices.

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  2. 40PL Free-Field Array Mic, High Pressure
    Freq range: 10 Hz to 20 kHz
    Dyn range: 32 dB(A) to 150 dB
    Sensitivity: 10 mV/Pa

    G.R.A.S. 40PL CCP Free-field Array Microphone, High Pressure

    The G.R.A.S. Array Microphone Type 40PL is a low-cost microphone for general purpose measurements in arrays and matrices. It has a wide useful frequency range reaching up to 20 kHz and a large dynamic range topping at around 150 dB.

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  3. 41AL Environmental Microphone
    Freq range:3.15 to 12.5
    Dyn range: < 17 dB(A) to > 156 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 41AL Environmental Microphone

    The G.R.A.S. 41AL Environmental Microphone is a precision microphone unit for outdoor measurements that can withstand continuous rain and operate over wide temperature ranges. It comes in four versions suited for community noise and airport noise with respectively 0º and 90º incidence.

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  4. 41AO Environmental Microphone System
    Dyn range: 14 dB(A) to 146 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 41AO Environmental Microphone System

    The G.R.A.S.  41AO Environmental Microphone System is a precision microphone unit (IEC 61672) for monitoring the noise of overhead aircraft. It can withstand rain and operate over a wide range of temperatures over periods lasting from a few days to several weeks.

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  5. 41AL-S4 CCP Environmental Microphone, Comm. Noise
    Freq range: TBD
    Dyn range: TBD
    Sensitivity: TBD

    G.R.A.S. 41AL-S4 CCP Environmental Microphone, Community Noise

    The G.R.A.S. 41AL-S4 CCP Environmental Microphone, Comm. Noise is a precision microphone unit for outdoor measurements that can withstand continuous rain and operate over wide temperature ranges. It comes in four versions suited for community noise and airport noise with respectively 0º and 90º incidence.

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  6. 40BI 1/4" Intensity Mic Kit
    Freq response: IEC 60651 Type 0 IEC
    Dyn range: 35 dB(A) to 172 dB
    Sensitivity: 4 mV/Pa

    G.R.A.S. 40BI 1/4" Ext. Polarized Intensity Microphone Kit

    The 40BI is an IEC 61094-compliant, WS3F ¼" externally polarized sound-intensity microphone pair. The 40BI microphone pair consists of two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. Their standard mounting threads make them compatible with all the usual available makes of measurement-microphone preamplifiers. Learn More
  7. 40AK 1/2" Intensity Mic Kit
    Freq response: IEC 60651 Type 0 IEC
    Dyn range: 20 dB(A) to 157 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 40AK 1/2" Ext. Polarized Intensity Microphone Kit

    The 40AK is an IEC 61094-compliant, WS2F ½" externally polarized sound-intensity microphone set. The microphones in the set are two 40AI microphones - two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. This microphone pair has a free-field frequency response that complies with IEC 61043 1993 Class 1 and IEC 60651 Type 1 in the range from 20 Hz to 10 kHz. Learn More
  8. 40AI 1/2" Intensity Mic Pair
    Freq response: IEC 60651 Type 0 IEC
    Dyn range: 20 dB(A) to 157 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 40AI 1/2" Ext. Polarized Intensity Microphone Pair

    The 40AI is an IEC 61094-compliant, WS2F ½" externally polarized sound-intensity microphone pair. The 40AI microphone pair consists of two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. Their standard mounting threads make them compatible with all the usual available makes of measurement-microphone preamplifiers. Learn More
  9. 40GK 1/2" Intensity Mic Kit
    Freq response: IEC 60651 Type 0 IEC
    Dyn range: 27 dB(A) to 163 dB
    Sensitivity: 12.5 mV/Pa

    G.R.A.S. 40GK 1/2" Prepolarized Intensity Microphone Kit

    The 40GK is an IEC 61094-compliant, WS2F ½" prepolarized sound-intensity microphone set. The microphones in the set are two 40GI microphones - two phase-matched free-field condenser microphones with extremely well-controlled phase characteristics for use in sound-intensity probes. This microphone pair has a free-field frequency response that complies with IEC 61043 1993 Class 1 and IEC 60651 Type 1 in the range from 20 Hz to 10 kHz. Learn More
  10. 50VX Intensity probe
    Freq range: IEC 61043
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VX Intensity Probe Type

    The G.R.A.S. X-Y-Z Intensity Probe Type 50VX is a two-channel intensity probe for serially measuring a three-dimensional sound intensity vector in a stationary sound field. It includes a pair of phase-matched intensity microphones Type 40AI mounted on a pair of Preamplifiers Type 26AA with adapters and spacers. The whole assembly is mounted on a swivel head that can be swivelled in three mutually-perpendicular directions by means of a pair of slider buttons on the probe handle. The probe handle has inputs for 2 preamplifiers and a pair of LEDs for indicating two states as well as a pair of push buttons for interactive use with a remote-control system. For example, the output socket for remote control can be connected to the RS232 interface of a computer which controls the process of data acquisition. Learn More
  11. 50VI-3 Wide-band intensity probe
    Freq range: IEC 61043
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VI-3 Wide-band intensity probe

    The G.R.A.S. Wide-band Intensity Probe Type 50VI-3 is a flexible and adjustable four-channel sound-intensity probe.

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  12. 50VI-1 Vector intensity probe
    Freq range: IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VI-1 Vector intensity probe

    The G.R.A.S. 50VI-1 Vector Intensity Probe is a flexible and adjustable, two or three-dimensional sound-intensity probe. The probe handle has marked inputs for 3 pairs of preamplifiers (a pair for each of the mutually-perpendicular directions) and a 24-pin LEMO output socket at its base for connecting it to a suitable Power Module (e.g. Type 12AC) or Power Modules (via cable adapter).

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  13. 50AI-B 1/2"  Intensity Probe
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-B 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-B Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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  14. 50GI CCP Intensity Probe
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 27 dB(A) to 146
    Sensitivity: 12.5 mV/Pa

    G.R.A.S. 50GI CCP Intensity Probe

    G.R.A.S. 50GI is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe. The small rugged 1/4" CCP preamplifiers ensure minimum disturbances to the sound field for accurate measurements in the full frequency range.

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  15. 50GI-R Intensity Probe with Remote Control
    Freq range: IEC 61043 Class 1
    Dyn range:
    Sensitivity:

    G.R.A.S. 50GI-R CCP Intensity Probe with Remote Control

    The 50GI-R is a sound intensity probe for direct connection to signal analyzers or data acquisition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe. The small rugged ¼" CCP preamplifiers ensure minimum disturbances to the sound field for accurate measurements in the full frequency range.

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  16. 50GI-P CCP Rugged Intensity Probe
    Freq range: IEC 61043
    Dyn range:
    Sensitivity:

    G.R.A.S 50GI-P CCP Rugged Intensity Probe

    Type 50GI-P is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe..

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  17. 50GI-RP CCP Rugged Intensity Probe
    Freq range: IEC 61043 Class 1
    Dyn range:
    Sensitivity:

    G.R.A.S 50GI-RP CCP Rugged Intensity Probe

    Type 50GI-RP is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe..

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    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-C 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-C Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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  19. /
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-D 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-D Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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  20. 40HT 1/2'' Lownoise Mic System
    Freq range: 10 Hz to 16 kHz
    Dyn range: 6.5 dB(A) to 113 dB
    Sensitivity: 800 mV/Pa

    G.R.A.S. 40HT 1/2'' Lownoise Microphone System

    The G.R.A.S. 40HT ½-inch Lownoise Microphone System has specifications similar to G.R.A.S. 40HH but can also be used in confined spaces.

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