Couplers for Telecom/Audio

		Type number

		Artificial Ear/Ear Simulator (6cc coupler w/o microphone and preamplifier) - Type 4152 Designed for measurements in the audiometric and related fields.


		Artificial Ear/Ear Simulator (IEC 60 318 coupler w/o microphone and preamplifier) - Type 4153 Designed for measurements in the audiometric and related fields. Fulfils the requirements of IEC 318 and has an acoustical impedance basically similar to that of the human ear.


		Ear Simulator/Artificial Ear (IEC 60711 coupler with microphone and preamplifier) - Type 4157 Designed for measurements on earphones coupled to the ear by ear inserts such as tubes or ear moulds or eartips.


		Artificial Mastoid - Type 4930 Designed for the calibration of bone conduction hearing aids and bone vibrators used in audiometry.