Thiết bị hiệu chuẩn độ ồn BSWA CA918 Free-field Sound Source
CA918 is a sound source designed to meet the requirements of free-field measurement of working standard microphone according to IEC 61094-8. It also can be used as free-field sound source required by IEC 62585, IEC 61672, GB/T 3785 and JJG 188 etc. to carry out the free-field sensitivity and frequency response measurement of microphone, sound level meter or other acoustic related equipment.