GRAS 48LA UTP Microphone, Áp suất cao

GRAS 48LA UTP Microphone, High Pressure

Part Number: 48LA

Category: GRAS Sound & Vibration

Status: Available

48LA is an Ultra-Thin Precision (UTP) high-pressure surface microphone for aeroacoustic testing.

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

Sale Price: Liên hệ

0903368648

+84903368648

1. Introduction

48LA is an Ultra-Thin Precision (UTP) high-pressure surface microphone for aeroacoustic testing.

It is a revolutionary new design that has made it possible to combine a 1/4" condenser microphone with a form factor that makes it the world\'s smallest measurement microphone.

The height of the microphone is 1 mm. It has a built-in preamplifier. The integrated cable connector is Microdot male. The total cable length is 3 meters.

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2. Applications and Uses

48LA is for high-level surface pressure measurements on planar and curved surfaces. Because of its low profile, It is ideal for measurements in boundary layers and turbulence, e.g. for

Wind-induced noise measurement on vehicles
Wind-tunnel testing
In-flight testing of airplanes

3. Mounting

48LA can be mounted using the RA4810 Hard fairing for 48LA/48LX-1, with click mount, and the included double-sided adhesive mounting pad. The fairing has a locking mechanism that makes it possible to install and remove the microphone without removing the fairing. The fairing has an angle of 7.5 degrees.

4. Specifications

Frequency range (±1 dB)	20 Hz to 20 kHz
Frequency range (±2 dB)	16 Hz to 31.5 kHz
Dynamic range (thermal noise)	64dB (A) to 184dB
Sensitivity	0.12 mV/Pa (-78.4 dB re 1V/Pa)
Output impedance	< 50 Ω

Supply current min. to max.	2 tới 10 mA
Microphone venting	Front venting
Operating temperature	-20 to 85 °C
Storage temperature	-40 to 85 °C
Temperature coefficient @250 Hz	-0.03 dB/°C
Static pressure coefficient @250 Hz	-0.0003 dB/kPa
Humidity range non condensing	0 tới 80 % RH
Humidity coefficient @250 Hz	-0.001 dB/% RH
Influence of axial vibration @1 m/s²	73 dB re 20 µPa
Connector type	Microdot 10/32
Weight	1 g