Microphone mảng trường tự do GRAS 40PH-10 CCP

GRAS 40PH-10 CCP Free-field Array Microphone

Part Number: GRAS 40PH-10

Category: GRAS Sound & Vibration

Status: Available

Freq range: 10 Hz to 20 kHz
Dyn range: 33 dB(A) to 135 dB
Sensitivity: 50 mV/Pa

Sale Price: Liên hệ

0903368648

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Technology

Typical applications and use

Multi-channel measurements
Sound-field analyses
Sound-power measurements
Concurrent spatial and transient measurements

Design

Array microphones are designed to be mounted on large or small arrays. Such systems are typically used for measuring and locating noise sources, and here the phase match is important to get good accuracy in the measurements. An important characteristic of array microphones is that the microphones are phase-matched.

40PH-10 has a wide useful frequency range reaching up to 20 kHz and a large dynamic range topping at 135 dB, the peak value before visible clipping.

It has an integrated CCP preamplifier and is delivered with a built-in TEDS chip which enables it to be programmed as a complete unit. The GRAS 40PH-10 requires a constant current power supply, e.g. the GRAS 12AL CCP Supply, or any other CCP compatible power supply.

Close manufacturing tolerances together with the advantages of the TEDS chip, provide the 40PH-10

with a high degree of interchangeability; a major advantage when used in multiples forming arrays and matrices.

The low cost of the 40PH-10 is a key consideration when setting up measurements requiring a multiplicity of concurrent transient and spatial data.

Calibrating the 40PH-10 with a GRAS pistonphone, e.g. GRAS 42AA, is as straight forward as calibrating any other GRAS 1/4-inch microphone.

All GRAS microphones are individually checked and calibrated before leaving the factory. An individual calibration chart is supplied with each microphone.

Specifications

Parameter	Unit	Value
Polarization/Connection	–	0 V / CCP
Frequency range (±1.5 dB)	Hz	50 to 5 kHz
Frequency range (±2 dB)	Hz	10 to 20 kHz
Dynamic range lower limit (microphone thermal noise)	dB(A)	< 33
Dynamic range upper limit	dB	135
Sensitivity @ 250 Hz (±2 dB)	mV/Pa	50
Power supply (Constant Current Power)	mA	2 to 20
Microphone venting	–	Front
Output impedance	Ω	< 50
Temperature range, operation	°C / °F	-10 to 50 / -50 to 122
Temperature range, storage	°C / °F	-20 to 60 / -4 to 140
Influence of axial vibration @1 m/s²	dB re 20 µPa	55
TEDS (IEEE 1451.4)	–	27 v. 1.0
Connector type	–	SMB
CE/RoHS/WEEE	–	Yes / Yes / Yes
Weight	g / oz	5.50 / 0.20
Phase matching 50 Hz – 100 Hz	degrees	±5˚
Phase matching 100 Hz – 3 kHz	degrees	±3˚
Phase matching 3 kHz – 5 kHz	degrees	±5˚
Phase matching 5 kHz – 10 kHz	degrees	±10˚