Describes an interim coupler for loading an earphone with a specified impedance, when calibrating audiometers, in the frequency range of 125 Hz to 8 000 Hz. The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person's ear. However, the IEC recommends its use as a simple and ready means for the exchange of specifications on audiometers and for the calibration of earphones used in audiometry.
Số hiệu tiêu chuẩn
IEC/TR 60303*CEI/TR 60303
Tên tiêu chuẩn
I E C provisional reference coupler for the calibration of earphones used in audiometry
Ngày phát hành
1970-00-00
Tiêu chuẩn tương đương
BS 4668 (1971-02-22), IDT * BS 4668 (1971-02-22), NEQ * GB/T 7342 (1987), IDT * SS-IEC 303 (1985-11-15), IDT * UNE 20644 (1982-10-15), IDT * NEN 10303 (1971), IDT
Từ khóa
Acoustics * Audiometry * Calibration * Earphones * Electrical engineering