Generic 711 Coupler — An Occluded Ear-Canal Simulator

Application ID: 12227

This is the model of an occluded ear canal simulator (a generic 711 coupler). Besides certain details the geometry corresponds to the Brüel & Kjær Ear Simulator Type 4157.

The real life couplers are used for simulating the acoustics of a standardized human ear canal and can be used for measurements on all sorts of devices. They are widely used in the hearing aid industry but also as ear canals on all sort of acoustic manikins for recording 3D sound.

About Brüel and Kjær:
Brüel & Kjær is a world leading manufacturer and supplier of sound and vibration test and measurement solutions. The products range from transducers (measurement microphones and vibration transducers), data acquisition and analysis software and hardware, hand held sound level meters, calibration systems, and more. The application areas are many and include aerospace, wind energy, environmental noise and sound, automotive, defense, and audio. See

This model example illustrates applications of this type that would nominally be built using the following products: