Shenzhen United Testing Technology Co., Ltd

EN50332 is divided into two parts, EN5032-1 and EN50332-2 .   A nd EN50332-2 is divided into EN5032-2-1 (player output voltage) and EN5032-2-2 (headset Broadband characteristic voltage test). The EN5032-1 includes the maximum sound pressure level measurement, for the performance of the player and the headset, the EN5032-2 includes two tests of the maximum output voltage and the broadband characteristic output voltage of the headset. Test requirements   of EN50332: 1. The product shall be tested in the silent room to avoid interference from environmental noise. The headphones are mounted on standard artificial ears, and the microphone is mounted to collect the sound of the headphones. Audioanalyser a nalyze and record the maximum sound pressure value (LAeq) for each audio. The standard sound source used in the test is the IEC60268-1. 2. The signal intensity of audio products playing digital signal (CD, DVD, MP3) is - 10dB, and analogue signal cassette is-6dB. The FM radio requi...

RoHS , short for Restriction of Hazardous Substances ,   is a certification for limiting the use of certain harmful substances in electrical and electronic products. The main purpose of RoHS certification: is to limit the use of 10 harmful substances of lead, mercury, cadmium, hexavalent chromium, PBDE and PBBs, tetra-brominated diphenyl ether, polychlorinated biphenyl, short chain chlorofaffin, tributybutyl tin composition in electrical and electronic products, in order to reduce the harm of these substances to human health and the environment. Test method and equipment of RoHS: 1. ICP-OES Induction-coupled plasma emission spectroscopy, which is the most commonly used method in RoHS detection, is mainly used for the detection of lead, chromium, cadmium and other metal elements. The principle is to atomize the sample solution and produce plasma, for qualitative and quantitative analysis through the elemental characteristic emission spectra. 2. ICP-MS Induction-coupled plasma mass s...