Aerospace & Defense

All industry applications bring their own challenges, but aerospace testing can be one of the harshest, pushing microphones to their limits. At GRAS we know that measurements often need to be carried out in high speed, turbulent air-flows, where it is vital that the microphone itself does not affect the measurements - and where the testing equipment has to be durable under extreme conditions. Often you only have one chance to record data so validation is vital.

And because we work closely with you, we are well aware of your needs and the challenges you face in such a unique industry. If we can improve your testing, you can improve your products.

GRAS has become an integral part of the aerospace industry, dedicated to finding new ways of testing. From standard microphones, customized flyover arrays or microphones for extreme sound pressures, GRAS has the right microphones to help you develop tomorrow’s airplanes today.

GRAS 26AR 1/4" Standard Preamplifier with Integrated Mini-connector

Freq range: 2.5 Hz - 200 kHz
Noise: 4 µV Gain: -0.35 dB
Special feature: For integration into structures

GRAS 26AR 1/4" Standard Preamplifier with Integrated Mini-connector

The GRAS 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...

GRAS 26CB 1/4" CCP Standard Preamplifier with Microdot Connector

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.35 dB
Special feature: General purpose

GRAS 26CB 1/4" CCP Standard Preamplifier with Microdot Connector

The GRAS 26CB 1/4" CCP Standard Preamplifier with Microdot Connector is a general-purpose preamplifier optimized for use with prepolarized condenser microphones. It is a small, robust unit and uses a GRAS CCP power supply, e.g. GRAS 12AL. It has a very low inherent noise level, a large dynamic range..

GRAS 26CG 1/4" CCP Preamplifier with Microdot Connector, Low Frequency

Freq range: 1 Hz - 200 kHz
Noise: 1.8 µV Gain: -0.35 dB
Special feature: For low-frequency applications

GRAS 26CG 1/4" CCP Preamplifier with Microdot Connector, Low Frequency

The GRAS 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...

GRAS 40AZ 1/2" Prepolarized Free-field Microphone, Low Frequency

Freq range: 0.5 Hz to 20 kHz
Dyn range: 14 dB(A) to 148 dB
Sensitivity: 50 mV/Pa

GRAS 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 GRAS 40AN...

GRAS 40BE 1/4" Prepolarized Free-Field Microphone

Freq range: 4 Hz to 80 kHz
Dyn range: 30 dB(A) to 168 dB
Sensitivity: 4 mV/Pa

GRAS 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...

GRAS 40BP 1/4" Ext. Polarized Pressure Microphone

Freq range: 4 Hz to 70 kHz
Dyn range: 34 dB(A) to 169 dB
Sensitivity: 1.6 mV/Pa

GRAS 40BP 1/4" Ext. Polarized Pressure Microphone

The 40BP is an IEC 61094 WS3P 1/4" externally polarized pressure microphone with rear-venting. It is a high-precision condenser microphone made according to IEC 61094-4 requirements. It is a low-sensitivity microphone for sound measurements at high levels and high frequencies. Its low sensitivi..

GRAS 40DP 1/8" Ext. Polarized Pressure Microphone

Freq range: 6.5 Hz to 140 kHz
Dyn range: 40 dB(A) to 178 dB
Sensitivity: 1 mV/Pa

GRAS 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...

GRAS 40LA 1/4" CCP Precision Surface Microphone, High Pressure

Freq range: 5 Hz to 70 kHz
Dyn range: 56 dB(A) to 178 dB
Sensitivity: 0.5 mV/Pa

GRAS 40LA 1/4" CCP Precision Surface Microphone, High Pressure

The GRAS 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...

GRAS 40LS 1/4" CCP Precision Surface Microphone

Freq range: 5 Hz to 70 kHz
Dyn range: 46 dB(A) to 167 dB
Sensitivity: 1.8 mV/Pa

GRAS 40LS 1/4" CCP Precision Surface Microphone

The GRAS 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...

GRAS 45CA Headphone/Hearing-protector Test Fixture

ISO: 4869-3
IEC: 60318-1 and 60318-4
depending on configuration

GRAS 45CA Headphone/Hearing-protector Test Fixture

The GRAS 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 GRAS 45CB...

GRAS 45CB Acoustic Test Fixture

ANSI: S12.42

GRAS 45CB Acoustic Test Fixture

The GRAS 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 GRAS 45CA...

GRAS 46AO 1/2'' CCP Pressure Standard Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 25 dB(A) to 150 dB
Sensitivity: 12 mV/Pa

GRAS 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...