Frequency range 50 to 10 000 c/s.

BS 2042:1953
Original price was: $264.16.$132.00Current price is: $132.00.
Specification. An artificial ear for the calibration of earphones of the external type
BSI Group , 01/13/1954

Original price was: $264.16.$132.00Current price is: $132.00.
Specification. An artificial ear for the calibration of earphones of the external type
BSI Group , 01/13/1954