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Reduced Vibration and Electromagnetic Energy Losses by Using Receiver Plastic Compartment with Metallization Technology

IP.com Disclosure Number: IPCOM000201638D
Original Publication Date: 2010-Nov-17
Included in the Prior Art Database: 2010-Nov-17
Document File: 1 page(s) / 66K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

The receiver unit is a main part of the acoustic system of hearing devices. However, it causes problems to the microphone, the telephone-coil, and the wireless antenna due to mechanical vibrations. The mechanical vibration energy of the receiver is transferred to the surface of the plastic frame compartment containing it directly via the receiver body contact. The vibrating takes place on the frame surface. This sound and kinetic energy transfer to the microphone inside leads to noise feedback like whistling.

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Reduced Vibration and Electromagnetic Energy Losses by Using Receiver Plastic Compartment with Metallization Technology

Idea: Hoong Yih Chan, SG-Singapore; Leep Foong Chew, SG-Singapore; Cheoung Hong Lee, SG-
Singapore; PhanHow Amy Cheng, SG-Singapore

The receiver unit is a main part of the acoustic system of hearing devices. However, it causes problems to the microphone, the telephone-coil, and the wireless antenna due to mechanical vibrations. The mechanical vibration energy of the receiver is transferred to the surface of the plastic frame compartment containing it directly via the receiver body contact. The vibrating takes place on the frame surface. This sound and kinetic energy transfer to the microphone inside leads to noise feedback like whistling.

Another problem is the receiver output sound, which is performed by an electromagnetic stimulation method. Parts of the electromagnetic energy leaks out from the receiver body, and then enters the telephone coil and the wireless antenna. This creates noise feedback during telephone mode and interferences to the wireless communication.

Up to now, the problem is mainly solved by placing the receiver unit as far and possible from the wireless antenna, microphone and telephone.

The idea to solve this problem is an application of layer of metal directly coated on the plastic frame via Vacuum Metallizati...