Reverberator Equipment Electronics Testing Labs Companies EMC LPS SELV Third-party testing and authentication services

Provide various AV/IT products testing and certification

With the advent of the Internet era, IT/AV multimedia has become an indispensable part of people's life, and its security, electromagnetic compatibility and reliability issues have become the focus of manufacturers and consumers.

Product range:

Radio, television, combination stereo, active speaker, tuner, Karaoke, sound mixer, video recorder, language repeater, television, monitor, Projector, TV antenna amplifier, video modulator, frequency converter, audio and modem, satellite television broadcasting receivers, set-top boxes, digital TV receiver, electronic organ, central processing unit (CPU), printers, monitors, scanners, picture-tel, fax, telephone switches, transponder, radio and television transmission receiving equipment, pagers, separation device, rotary steam Type DRYER, ENGRAVING machine, LASER cutting machine, SAwing machine and SLicing machine, CENTRIFUge, injection machine, oven and heating furnace, ion implantation machine, microscope, measuring and testing instruments, color separators, spectrometers, optical ray equipment, word processors, etc.

The sound mixer can make the singer will not feel labored when singing, as long as the singing is not out of tune, regardless of the voice conditions, can get very good acoustics. The artificial reflected sound can cover up the defects of the singer's singing skills and process the original human voice.

Testing standard

Reverberation time is not only an important content in architectural acoustic design, but also an important factor to be considered in many practical engineering measurements.
For architectural acoustics, rooms with different uses all need a suitable reverberation time. For example, for classrooms, in order to ensure good speech intelligibility, the reverberation time is not required to be too high. For the concert hall, in order to ensure the full degree of music, it also requires a certain reverberation time.
At the same time, for sound pressure measurement, when the surrounding environment is rigid wall, it is necessary to consider the sound pressure level correction caused by the reflection of sound waves around, which is also determined by measuring reverberation time. The reverberation time of the receiving chamber should also be considered for the sound insulation measurement of building components.
Therefore, the main functions of reverberation test in noise test are as follows:
1. Determine whether the reverberation time of the room meets its functional requirements.
2. Obtain the environmental correction factor K2
3. Standardized sound pressure level difference of sound insulation of building components on site.
Indoor reverberation time test can be carried out according to the standard GB/T 50076-2013
Reverberation test equipment:
B&K PULSE 3109 signal generator and signal acquisition system
Gras 1/2 microphone
B&K Pulse Test and analysis system
JBL active speaker

Routine test items

1, safety project:

Input current test, label to wipe test, energy level test, SELV test, current limiting circuit testing (LCC), limited power test (LPS), grounding continuity test, temperature and humidity (tide) test, drop, impact and other mechanical stress tests, the ball pressure test and normal temperature test, contact voltage, electric current test, insulation test voltage, abnormal test, yuan A fault testing, etc.

2, the EMC test project:

Conduction, radiation, harmonic, voltage fluctuation and flicker, electrostatic, RS, EFT, surge, CS, power frequency magnetic field, such as voltage sag.

Environmental reliability Testing

High and low temperature resistance test, heat and humidity resistance, high and low temperature impact, high and low temperature alternating, mechanical vibration, mechanical impact, low pressure (vacuum) test, IP grade, dustproof water release test, gas corrosion (single/multiple), salt spray corrosion test (neutral, acid, compound), etc.

Class specific tests

Battery charging and discharging test, impact test, impact test, drop test, ROhs testing, REACH, halogen detection, temperature and humidity environment test, failure analysis, components selection, pressure test, light aging test, sand and dust test, get wet in the rain test, vibration test, high speed test, mechanical shock test, biological environment test, salt spray test and reliable integrated environment Sex test, simulated packaging and transportation test, gas corrosion test, slice test, etc.

Energy efficiency test

Energy saving testing, energy efficiency testing

Electrical performance testing

Operating voltage, operating current, speed range, power, conductivity, dielectric constant, dielectric loss, field strength (breakdown voltage), etc

2. Certification services

The test report issued by Global Zhongyi has legal effect and can be used in scenarios such as the entry of supermarkets, product appeals, anti-malicious rights protection, and auctions (appeals and auctions must meet Party A's testing requirements).