Ear simulator 4157

Ear Simulator Type 4157 with microphone and preamplifier is designed for measurements on earphones coupled to the ear by ear inserts such as tubes or ear moulds or eartips The Ear Simulator Type 4157 closely reproduces the acoustical parameters of the human ear, presenting the insert earphone under test with an impedance approximating that of the real human ear. USE SCENARIOS Frequency response, sensitivity and distortion measurements on insert earphones, e.g. used in hearing aids, operator headsets, etc. Servicing of hearing aids Production testing of earphones