The electret microphone, which is widely used in electrical appliances such as radio cassette recorders and telephones, directly affects the performance of voice transmission and recording. The sensitivity of this type of microphone can be easily tested with a multimeter.
Dial the multimeter to the R & TImes; 100 position, the two test leads are respectively connected to the two electrodes of the microphone (be careful not to be wrongly connected to the ground electrode of the microphone). Even), observe the swing amplitude of the hands while blowing air. At the moment of blowing, the greater the amplitude of the needle swing, the higher the microphone sensitivity, and the better the speech delivery and recording effects. If the swing amplitude is not large (fine movement) or does not swing at all, it means that this microphone has poor performance and should not be used.
COB Light
COB LED par light for theatre, productions, TV studio, stage
Description:
COB200-2in1 is a professional theatre fixture that utilizes a 200W warm-white and cold-white COB LED with a color temperature of 3200k-6000K. Users are able to creat a customized color tempreature via a DMX Controller or set directly on the display menu. It offers a high-power light output with rich hues and smooth color mixing for stage and wall washing. The double bracket makes installing easily and versatile.
Our company have 13 years experience of LED Display and Stage Lights , our company mainly produce Indoor Rental LED Display, Outdoor Rental LED Display, Transparent LED Display,Indoor Fixed Indoor LED Display, Outdoor Fixed LED Display, Poster LED Display , Dance LED Display ... In additional, we also produce stage lights, such as beam lights Series, moving head lights Series, LED Par Light Series and son on...
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Guangzhou Chengwen Photoelectric Technology co.,ltd , https://www.cwleddisplay.com