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head and torso simulator (HATS)

In order to be able to realistically reproduce binaural sound recordings, i.e. two-voice sound recordings, the founder of the Beyerdynamik company, Eugen Beyer, developed an artificial head in the 1930s which corresponds to the human head. More recent head replicas take into account the auricles and the auditory canals and have two microphones

in place of the eardrums. The delay differences

, frequency differences and level differences between the two microphones thus reproduce the human hearing sensation. Theinfluence of these parameters is called the head related

transfer function (HRTF).The artificial head is used for testing purposes

.

In the 1960s, there were also stereo radio broadcasts in artificial head stereophony. In these sound recordings, sounds, speakers or individual musical instruments could be matched in direction and distance. Even if they originated behind or above the listener. To fully enjoy the stereo effect and surround sound, these sound recordings should only be listened to with headphones

.

Artificial head for stereoscopic audio measurements, photo: MMK

Artificial head for stereoscopic audio measurements, photo: MMK

Mercedes Benz uses the artificial head recording technique for testing purposes in the development of automotive audio systems.

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Englisch: head and torso simulator - HATS
Updated at: 26.01.2018
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