Sound reflector in hand set for controlling distance communicating tech.

Abstract

The acoustic reflection suppression device has a channel (17) which is sealed with respect to the interior of the telephone handset, used for connecting the volume on the rear side of the hearing capsule (16) with the outside of the telephone handpiece at a point which is spaced from the ear of the user.

Description

technical field [0001] The present invention relates to a structure for suppressing sound reflections in a hand-held device for telephony technology. Background technique [0002] It is important that the telephone set be affected as little as possible by reflections of the received signal in order to allow unimpeded communication between the callers. Reflections occur not only in the telephone line area, but also in the handset area. In particular, the sound signal of the earpiece capsule is influenced by the microphone, and this sound signal is passed on to the telephone line. The caller thus has the impression of sound reflections, Hall effect and reverberation. [0003] Reasons for this are, for example, poor sound cancellation between the earphone and the handset microphone due to sound reflections inside the earpiece (acoustic feedback). [0004] Another disadvantage is that, especially at present, cordless and mobile phones are so extremely downsized that problems ...

AI Technical Summary

Problems solved by technology

[0012] However, the hole in the back of the earpiece capsule is detrimental to the aforementioned problem of poor sound attenuation because it causes sound to be reflected from the back of the diaphragm into the interior of the housing of the handheld

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