1. 45CA Headphone/Hearing-protector Test Fixture
    ISO: 4869-3
    IEC: 60318-1 and 60318-4 depending on configuration

    G.R.A.S. 45CA Headphone/Hearing-protector Test Fixture

    The G.R.A.S. 45CA Hearing-protector Test Fixture is a versatile test fixture for measuring sound isolation of hearing-protectors according to ISO 4869-3 and ear- and headphones according to IEC60318-1 or 60318-4.
    For testing hearing-protectors according to ANSI/ASA S12.42, choose G.R.A.S. 45CB.

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  2. 40AZ 1/2" Free-field Mic, Low Frequency
    Freq range: 0.5 Hz to 20 kHz
    Dyn range: 14 dB(A) to 148 dB
    Sensitivity: 50 mV/Pa

    G.R.A.S. 40AZ 1/2" Prepolarized Free-field Microphone, Low Frequency

    The 40AZ is a prepolarized free-field microphone with a large dynamic range and a wide frequency response. Its externally polarized equivalent is G.R.A.S. 40AN.

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  3. 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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  4. 26CG 1/4" CCP Preamp, Low Frequency (Mdot)
    Freq range: 1 Hz - 200 kHz
    Noise: 1.8 µV
    Gain: -0.35 dB
    Special feature: For low-frequency applications

    G.R.A.S. 26CG 1/4" CCP Preamplifier with Microdot Connector, Low Frequency

    The G.R.A.S. 26CG ¼″ CCP Preamplifier is a small robust unit optimised for acoustic measurements using condenser microphones. It has a very low inherent noise level, a wide dynamic range, and a wide frequency response from below 1 Hz to above 200 kHz.

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  5. 26AR 1/4" Standard Preamp, Mini-connector
    Freq range: 2.5 Hz - 200 kHz
    Noise: 4 µV
    Gain: -0.35 dB
    Special feature: For integration into structures

    G.R.A.S. 26AR 1/4" Standard Preamplifier with Integrated Mini-connector

    The G.R.A.S. 26AR 1/4" Preamplifier is a small robust unit short enough for use in confined spaces. It has a very low inherent-noise level, a wide dynamic range and a frequency response from below 2 Hz to above 200 kHz.

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  6. 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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  7. 67SB Blast Probe Mic
    Freq range: 10 Hz to 20 kHz
    Dyn range: 44 dB(A) to 174 dB

    G.R.A.S. 67SB Blast Probe Microphone according to ANSI S12.42

    The G.R.A.S. 67SB Blast Probe is designed as a reference microphone for impulse measurements according to the ANSI/ASA S12.42 standard.

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  8. AM0069 Windscreen for 1/2" Microphones

    Outer diameter: 90 mm
    Hole diameter: 12 mm
    Material: Foam

    G.R.A.S. AM0069 Windscreen for 1/2" Microphones

    AM0069 contains 5 spherical windscreens for 1/2" microphones optimized for sound pressure measurements under free-field conditions.

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  9. 46DP-1 1/8" Pressure Set
    Freq range: 6.5 Hz to 140 kHz
    Dyn range: 46 dB(A) to 178 dB
    Sensitivity: 0.7 mV/Pa

    G.R.A.S. 46DP-1 1/8" LEMO Pressure Standard Microphone Set

    The 46DP-1 is a 1/8” LEMO microphone set for pressure measurements. 

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  10. 47AC 1/2" CCP Infra-Sound Mic Set
    Freq range: 0.09 Hz to 20 kHz
    Dyn range: 20 dB(A) to 148 dB
    Sensitivity: 8 mV/Pa

    G.R.A.S. 47AC 1/2" CCP Infra-Sound Microphone Set

    The G.R.A.S. 47AC is a 1/2" CCP free-field microphone set optimized for infra-sound measurements down to 0.09 Hz.

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  11. 67TS-1-CL Turbulence Screen Kit with Flush-mount Microphone
    Turb. att.: Up to 25 dB*
    Turb. speed: Up to Mach 0.2
    Turb. suppr. freq. range: 500 Hz - 10 kHz*
    Acoustic att.: Less than 3 dB
    Directivity: ± 60 Deg
    Freq. range (acoustic) 100 Hz - 70 kHz
    Dyn.range 44 dB(A) - 166 dB
    *Depending on flow-speed

    G.R.A.S. 67TS-1-CL Turbulence Screen Kit with Flush-mount Microphone

    The G.R.A.S. 67TS-1-CL Turbulence Screen Kit is designed for aeroacoustic testing in solid-walled wind tunnels. The hydrodynamic component of turbulence is attenuated up to 25 dB. Thereby the acoustic signals of interest can be identified and diagnosed with a reliable resolution.

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  12. 47AX 1/2'' CCP Flush-mount Mic Set
    Freq range: 3.15 Hz to 20 kHz
    Dyn range: 22 dB(A) to 150 dB
    Sensitivity: 12.5 mV/Pa

    G.R.A.S. 47AX 1/2'' CCP Flush-mount Microphone Set

    The G.R.A.S. 47AX 1/2" CCP Flush-Mount Microphone Set is a low profile 1/2" precision pressure microphone with built-in CCP preamplifier.

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  13. 47BX 1/4" CCP Flush-mount Microphone Set
    Freq range: 4 Hz to 70 kHz
    Dyn range: 44 dB(A) to 166 dB
    Sensitivity: 1.6 mV/Pa

    G.R.A.S. 47BX 1/4" CCP Flush-mount Microphone Set

    The G.R.A.S. 47BX 1/4" CCP Flush-Mounted Microphone Set is a low profile 1/4" precision pressure microphone with built-in CCP preamplifier.

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  14. 47DX 1/8” CCP Flush-mount Mic Set
    Frequency range: 10 Hz to 100 kHz
    Dynamic range: 52 dB(A) to 174 dB
    Sensitivity: 0.9 mV/Pa

    G.R.A.S. 47DX 1/8” CCP Flush-mount Microphone Set

    The G.R.A.S. 47DX 1/8" CCP Flush-mount Microphone Set is a low profile 1/8" precision pressure microphone with built-in CCP preamplifier and TEDS.

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  15. 40LS 1/4" CCP Precision Surface Mic
    Freq range: 5 Hz to 70 kHz
    Dyn range: 46 dB(A) to 167 dB
    Sensitivity: 1.8 mV/Pa

    G.R.A.S. 40LS 1/4" CCP Precision Surface Microphone

    The G.R.A.S. 40LS High-Precision Surface Microphone is a high-precision microphone for measurements on planar and curved surfaces. It has a wide useful frequency range reaching up to 70 kHz and a large dynamic range topping at around 167 dB.

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  16. 40LA 1/4" CCP Precision Surface Mic, High Pressure
    Freq range: 5 Hz to 70 kHz
    Dyn range: 56 dB(A) to 178 dB
    Sensitivity: 0.5 mV/Pa

    G.R.A.S. 40LA 1/4" CCP Precision Surface Microphone, High Pressure

    The G.R.A.S. 40LA High-Precision Surface Microphone is a high-precision microphone for measurements on planar and curved surfaces. It has a wide useful frequency range reaching up to 70 kHz and a large dynamic range topping at around 178 dB.

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  17. 46AO 1/2'' Pressure Set
    Freq range: 3.15 Hz to 20 kHz
    Dyn range: 25 dB(A) to 150 dB
    Sensitivity: 12 mV/Pa

    G.R.A.S. 46AO 1/2'' CCP Pressure Standard Microphone Set

    The 46AO is a 1/2" CCP microphone set for wide-frequency pressure measurements. Its LEMO equivalent is 46AG.

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  18. 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
  19. 46DD 1/8'' Pressure Set
    Freq range: 6.5 Hz to 70 kHz
    Dyn range: 47 dB(A) to 175 dB
    Sensitivity: 0.62 mV/Pa

    G.R.A.S. 46DD 1/8'' CCP Pressure Standard Microphone Set

    G.R.A.S. 46DD 1/8'' CCP Pressure Microphone Set

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  20. 46DD-FV 1/8'' Pressure Set, Front Vented
    Freq range: 6.5 Hz to 70 kHz
    Dyn range: 47 dB(A) to 175 dB
    Sensitivity: 0.62 mV/Pa

    G.R.A.S. 46DD-FV 1/8'' CCP Pressure Standard Microphone Set, Front Vented

    G.R.A.S. 46DD-FV is a 1/8'' CCP Pressure Microphone Set with front venting

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