Special microphones

Special microphones are often required for applications where there are particular requirements regarding the methods of measurements and configurations.

GRAS special microphones are categorized as

GRAS 41AC-3 CCP Outdoor Microphone for Community & Airport Noise

Standard: IEC 61672-1
TEDS
Special features: Configurable for 90 or 0 degrees of incidence
IP55 proof

GRAS 41AC-3 CCP Outdoor Microphone for Community & Airport Noise

The 41AC-3 is an outdoor microphone for unattended use for prolonged periods of time. It can be used for community noise applications or for monitoring of overhead aircraft noise...

GRAS 41AC-4 LEMO Outdoor Microphone for Community and Airport Noise (0 V pol.)

Standard: IEC 61672-1
Configurable for 90 or 0 degrees of incidence
IP55 proof

GRAS 41AC-4 LEMO Outdoor Microphone for Community and Airport Noise (0 V pol.)

The 41AC-4 is an outdoor microphone for unattended use for a prolonged period of time. It can be used for community noise applications or for monitoring of overhead aircraft noise...

GRAS 41AM Permanent Outdoor Microphone System for airport noise

Dyn range: 20 dB(A) to 156 dB
Sensitivity: 50 mV/Pa
0° incidence (airport noise)

GRAS 41AM Permanent Outdoor Microphone System for airport noise

The GRAS 41AM Outdoor Microphone System is for outdoor use whenever trouble-free acoustic measurements and, in particular, noise monitoring around airports are required...

GRAS 41CN Permanent Outdoor Microphone System for community noise

Dyn response: 20 to 156
Sensitivity: 50 mV/Pa
90° incidence (community noise)

GRAS 41CN Permanent Outdoor Microphone System for community noise

GRAS 41CN Permanent Outdoor Microphone System for community noise..

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

Freq range (±3 dB): 0.5 Hz to 20 kHz
Dyn range: 17 dB(A) to 138 dB
Sensitivity: 50 mV/Pa
Use: For low frequency acoustic diagnostics

GRAS 46AZ 1/2'' CCP Free-field Standard Microphone Set, Low Frequency

The GRAS 46AZ is a 1/2" Constant Current Power (CCP) free-field microphone set for measuring medium sound pressure levels at low frequencies. It is terminated with a BNC connector and is TEDS compatible. The equivalent traditional 200 V (LEMO) type is GRAS 46AN...

GRAS 47AC 1/2" CCP Infra-Sound Microphone Set

Freq range: 0.09 Hz to 20 kHz
Dyn range: 20 dB(A) to 148 dB
Sensitivity: 8 mV/Pa

GRAS 47AC 1/2" CCP Infra-Sound Microphone Set

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

GRAS 47AD 1/2'' CCP Flush-mount Microphone Set, High Sensitivity

Freq range: 3.15 Hz to 10 kHz
Dyn range: 18 dB(A) to 138 dB
Sensitivity: 50 mV/Pa

GRAS 47AD 1/2'' CCP Flush-mount Microphone Set, High Sensitivity

The GRAS 47AD 1/2" CCP Flush-Mount Microphone Set is a low profile 1/2" precision pressure microphone with built-in CCP preamplifier. It's identical to the GRAS 47AX but differ in specifications...

GRAS 47AX 1/2'' CCP Flush-mount Microphone Set

Freq range: 3.15 Hz to 20 kHz
Dyn range: 22 dB(A) to 150 dB
Sensitivity: 12.5 mV/Pa

GRAS 47AX 1/2'' CCP Flush-mount Microphone Set

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

GRAS 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

GRAS 47BX 1/4" CCP Flush-mount Microphone Set

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

GRAS 47DX 1/8” CCP Flush-mount Microphone Set

Frequency range: 10 Hz to 100 kHz
Dynamic range: 52 dB(A) to 174 dB
Sensitivity: 0.8 mV/Pa

GRAS 47DX 1/8” CCP Flush-mount Microphone Set

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

GRAS 47HC 1/2'' CCP Low-noise Microphone System

Freq range: 10 Hz to 20 kHz
Dyn range: 6.5 dB(A) to 100 dB SPL (20 Hz - 8 kHz)
                      6.5 dB(A) to 85 dB SPL (8 kHz - 20 kHz)
Sensitivity: 450 mV/Pa

GRAS 47HC 1/2'' CCP Low-noise Microphone System

The GRAS 47HC 1/2" Low-noise Microphone System measures sound pressure levels down to close to the threshold of human hearing. It is thus generally suitable for sound-power measurements on even very quiet products. Its very wide dynamic range permits measurements down to below 6.5 dB re. 20 μPa (in ..

GRAS 48LA UTP Microphone, High Pressure

Freq range:  20 Hz to 20 kHz (±1 dB)
                       16 Hz to 31.5 kHz (±3 dB)
Dyn range: 64 dB(A) to 184 dB
Sensitivity: 0.12 mV/Pa (±2 dB)
Use: For aeroacoustic measurements

GRAS 48LA UTP Microphone, High Pressure

48LA is an Ultra-Thin Precision (UTP) surface microphone for aeroacoustic testing. It is a low-profile 1/4" CCP high-pressure condenser microphone. The microphone is only 1 mm high and can, therefore, be mounted in air-flow without disturbing the sound field...