1. 46BD 1/4" Pressure Set
    Freq range: 4 Hz to 70 kHz
    Dyn range: 44 dB(A) to 166 dB
    Sensitivity: 1.45 mV/Pa

    G.R.A.S. 46BD 1/4" CCP Pressure Standard Microphone Set

    The 46BD is a 1/4" CCP microphone set for pressure measurements. Learn More
  2. RA0038 1/2'' 2cc Coupler IEC 60318-5
    Volume: 2 cc
    ANSI: S3.7
    IEC: 60318-5
    Special feature: For 1/2" pressure microphones

    G.R.A.S. RA0038 1/2'' 2cc Coupler according to IEC 60318-5

    The G.R.A.S. RA0038 Coupler is a standard 2 cm³ Coupler according to IEC 126 and ANSI S3.7-1973. It uses a ½" microphone (preferably the G.R.A.S. 40AG) with a suitable preamplifier (e.g. G.R.A.S. 26AC which is a ¼" preamplifier but is supplied with an adapter for ½" microphones).

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  3. 50GI CCP Intensity Probe
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 27 dB(A) to 163
    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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  4. 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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  5. 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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  6. 44AA Mouth Sim ITU-T P51, power amp
    ITU-T rec.: P.51
    Special feature: Built-in power amplifier

    G.R.A.S. 44AA Mouth Simulator according to ITU-T Rec. P51 with built-in power amplifier

    G.R.A.S. 44AA Mouth Simulator  is a sound source which simulates the sound field around the human mouth at close quarters and complies with the Standards IEEE 269, 661 and ITU-T Rec. P51.

    G.R.A.S. 44AA is for testing telephone mouthpieces as well as other microphones similarly used in communication networks.

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  7. 44AB Mouth Sim ITU-T P51
    ITU-T rec.: P.51
    IEEE standards: 269, 661

    G.R.A.S. 44AB Mouth Simulator according to ITU-T Rec. P51

    G.R.A.S. 44AB Mouth Simulator is a sound source which simulates the sound field around the human mouth at close quarters and complies with the Standards IEEE 269, 661 and ITU-T Rec. P51.

    G.R.A.S. 44AB is for testing telephone mouthpieces as well as other microphones similarly used in communication networks.

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  8. 45CB Acoustic Test Fixture
    ANSI: S12.42

    G.R.A.S. 45CB Acoustic Test Fixture

    The G.R.A.S. 45CB Acoustic Test Fixture is specified and designed for measuring sound isolation of hearing-protectors and ear- and headphones according to the ANSI/ASA S12.42 standard. For testing in accordance with the ISO 4869-3 standard, choose G.R.A.S. 45CA.

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  9. RA0020 1/2" Nosecone

    Length: 54.0 mm
    Outer diameter: 13.2 mm
    Threading (mic. protection grid threading): 12.70-60 UNS-2
    Material: Stainless steel
    Weight: 45 g

    G.R.A.S. RA0020 1/2" Nosecone

    The RA0020 is specially designed and optimized for use with 1/2" microphones for sound pressure measurements, when high speed wind comes from one known direction e.g. in a wind tunnel.
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  10. RA0058 1/2'' to 1'' Microphone Adapter

    Length: 17.00 mm
    Diameter: 23.77 mm
    Material Stainless steel

    G.R.A.S. RA0058 1/2'' to 1'' Microphone Adapter

    Dimension adapter which increases the diameter of a 1/2" microphone to 1". The adapter is relevant for use with G.R.A.S. 45CA Hearing-protector test fixture or in other situations where a 1/2" microphone is to be mounted in a 1" inner diameter hole/cylinder.

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  11. 45BB-3 For Sound Quality Recording, 2-Ch LEMO
    Connection: Traditional Power Supply (200 V/LEMO)
    Channel(s): 2
    ANSI: S3.36
    ITU-T Rec. P.57 Type 3.3 based on ITU-T Rec. P.58

    G.R.A.S. 45BB-3 KEMAR Head & Torso for Sound Quality Recording, 2-Ch LEMO

    The 45BB-3 KEMAR Head and Torso for Sound Quality Recording is an acoustic research tool with built-in 1/2" microphones for realistic sound quality testing and recordings. It is easy ro replace the 1/2" microphones with 1/4" microphones if preferred. Its CCP equivalent is G.R.A.S. 45BB-4 KEMAR Head & Torso for Sound Quality Recording, 2-Ch CCP.

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  12. 45BC-3 With Mouth Sim for Telephone Test, 1-Ch LEMO
    Connection: Traditional Power Supply (200 V/LEMO)
    Channel(s): 1
    ANSI: S3.36, S3.25
    IEC: 60318-4
    ITU-T Rec. P.57 Type 3.3 based on ITU-T Rec. P.58
    Special feature: Built-in power amplifier for mouth simulator

    G.R.A.S. 45BC-3 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch LEMO

    The 45BC-3 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch LEMO is configured with pinnae and with IEC 60318-4 Ear Simulator and ear canal extension in the right ear. Due to the design of KEMAR, realistic measurement in a sound environment as experienced by a human being using a hearing aid is possible. In addition, the 45BC-3 is provided with a mouth simulator for testing of the microphone in the telephone. The 45EA handset positioning system is included. Its CCP equivalent is G.R.A.S. 45BC-4 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch CCP.

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  13. 45BC-4 With Mouth Sim for Telephone Test, 1-Ch CCP
    Connection: Constant Current Power (0 V/CCP)
    Channel(s): 1
    ANSI standards: S3.36, S3.25
    IEC standards:60318-4 (formerly 60711), 60318-7 (formerly 60959)
    Special feature: Telephone test

    G.R.A.S. 45BC-4 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch CCP

    The 45BC-4 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch CCP is configured with pinnae and with IEC 60318-4 Ear Simulator and ear canal extension in the right ear. Due to the design of KEMAR, realistic measurement in a sound environment as experienced by a human being using a hearing aid is possible. In addition, the 45BC-3 is provided with a mouth simulator for testing of the microphone in the telephone. The 45EA handset positioning system is included. Its CCP equivalent is G.R.A.S. 45BC-3 KEMAR Head & Torso with Mouth Simulator for Telephone Test, 1-Ch LEMO.

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  14. 46BL 1/4" Pressure Set, High Sensitivity
    Freq range: 4 Hz to 20 kHz
    Dyn range: 25 dB(A) to 147 dB
    Sensitivity: 18 mV/Pa

    G.R.A.S. 46BL 1/4" CCP Pressure Standard Microphone Set, High Sensitivity

    The 46BL is a high-sensitive, low-noise 1/4" CCP condenser microphone set with rear-venting.

    The set consists of a 40BL 1/4" CCP Pressure Microphone, High Sensitivity and a 26CB 1/4" preamplifier with Microdot connector.

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  15. RA0045-S1 Prepol Ear Sim IEC 60318-4 (60711)
    Volume: 1260 mm³ @ 500 Hz
    Dyn range: 25 dB(A) to 150 dB
    IEC: 60318-4

    G.R.A.S. RA0045-S1 Prepolarized Ear Simulator According to IEC 60318-4 (60711)

    G.R.A.S. RA0045-S1 is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. The RA0045 includes a 40AO 1/2" prepolarized pressure microphon and each RA0045 is individually calibrated with this specific microphone.

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  16. 43AI CCP Ear Sim Prod Test ITU-T P57 3.2 HL
    Connection: 0 V/CCP
    Volume: Complex
    Dyn range: 25 dB(A) to 150 dB
    ANSI: S3.7

    G.R.A.S. 43AI CCP Ear Simulator for Production Testing Based on ITU-T Rec. P57 Type 3.2 High-leak

    The G.R.A.S. 43AI ear simulator consists of the ITU-T Rec. P.57 Type 2 Ear Simulator and Type 3.2 Simplified High-leak Pinna Simulator and is designed for making ITU-T standardized tests of telephone handsets, receivers and receiver/loudspeaker-modules on the production line.

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  17. 43AH CCP Ear Sim Prod Test ITU-T P57 3.2 LL
    Connection: 0 V/CCP
    Volume: Complex
    Dyn range: 25 dB(A) to 150 dB
    ANSI: S3.7
    IEC: 60318-1 & -2

    G.R.A.S. 43AH CCP Ear Simulator for Production Testing Based on ITU-T Rec. P57 Type 3.2 Low-leak

    This G.R.A.S. 43AH ear simulator consists of the ITU-T Rec. P.57 Type 2 Ear Simulator and Type 3.2 Simplified Low-leak Pinna Simulator and is designed for making ITU-T standardized tests of telephone handsets, receivers and receiver/loudspeaker-modules on the production line.

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  18. 40BE 1/4" Free-Field Mic
    Freq range: 4 Hz to 80 kHz
    Dyn range: 30 dB(A) to 168 dB
    Sensitivity: 4 mV/Pa

    G.R.A.S. 40BE 1/4" Prepolarized Free-Field Microphone

    The 40BE is an IEC 61094 WS3F 1/4” prepolarized free-field microphone with rear-venting. The externally polarized equivalent is 40BF.

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  19. 40EN 1" Pressure Mic
    Freq range: 2.6 Hz to 8 kHz
    Dyn range: 9.6 dBA to 146 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40EN 1" Ext. Polarized Pressure Microphone

    The 40EN is an IEC 61094 WS1P 1" externally polarized pressure microphone. It is a 1" pressure microphone that is ideal for measurements in couplers used for testing earphones. When flush-mounted, it can measure sound pressures at boundaries. It is highly suited as a laboratory-standard microphone.

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  20. 40DP 1/8" Pressure Mic
    Freq range: 6.5 Hz to 140 kHz
    Dyn range: 40 dB(A) to 178 dB
    Sensitivity: 1 mV/Pa

    G.R.A.S. 40DP 1/8" Ext. Polarized Pressure Microphone

    The 40DP is an IEC 61094 1/8" externally polarized pressure microphone with rear-venting. Due to its tiny size, this high-precision condenser microphone can be used to measure very high frequency sounds without disturbing the sound field. Learn More

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