Semi-Anechoic Lab

IntroductionSystem noise level is requested in some restricted field uses such as medical term. Noise source comes from operating components & devices and also by their resonance. The capability of Semi-Anechoic chamber is to set an environment to isolate external noise in order to measure the sound generated from system. With the test, it can be found the noise source in order to create a solution to meet the noise requirement.

Test product: System

Features:Semi-Anechoic chamber, follows ISO-3745 regulation

to set a free sound field environment.

GRAS Microphone: Expertise of noise sensor vendor.

Software DSP Italy (DSP Signal analyzing software).

Satisfy inverse square frequency: 136Hz~20kHz.

Sound insulation≧50dB.

Inside Sound insulation ≦15dB(A).

Low noise product becomes even more popular nowadays. By testing in the Semi-Anechoic chamber, it can be easy to find the noise source and create a solution for it.

Acoustic Enclosures Type

Inner Size

Semi-Anechoic Chamber

250cmL x 250cmW x 250cmH

Outside Size

Insulation

395cmL x 395cmW x 348cmH

floating floor.Electro galvanized steel(SECC)，surface treatment

Compact Absorbers

Polymer Absorption wedge (Taiwan)

Acoustic Doors Pressured door, only can be open outside 4 layers of Rubber Packing

Standard Semi-Anechoic Chamber ISO3745

Rectifier 1KW 110V to 110V 1:1.

Cable Belden (USA)

Apparatus GRAS Low Noise Microphone System IEA EA-2 Electro-Acoustic Integrated SystemSoftware DSP

Acoustic Enclosures Type

Semi-Anechoic Chamber

Hz dB

1/3Octave Band Frequency

Allowable differences

≦630800 to 5000≧6300

±2.5±2.0±3.0

EUT

Microphone PreAmplifier

System Software

Acoustic IntegratedSystem

Noise Test