Special microphones

Special microphones are often required for applications where there are particular requirements regarding the methods of measurements and configurations.
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 173 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 50AI-B 1/2" LEMO Intensity Probe

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

GRAS 50AI-B 1/2" LEMO Intensity Probe

The GRAS 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- Measureme..

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

GRAS 50AI-C 1/2" LEMO Intensity Probe

The GRAS 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- Measureme..

GRAS 50AI-D 1/2" LEMO Intensity Probe

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

GRAS 50AI-D 1/2" LEMO Intensity Probe

The GRAS 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- Measureme..