Sound insulating cap for sound level meters

Details Sound insulating cap for sound level meters Sound insulating cap for sound level meters

1997-02-24

1999-02-09

Tran, Sinh

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having protective or sheilding feature

381169, H04R 2500

Patent

active

058704833

ABSTRACT:
A sound-insulating cap is designed for conventional microphones without EMI protection. In an environment where EMI is likely to affect the performance of a conventional microphone, the cap is used to eliminate a substantial part of the acoustic noise and thus assess whether EMI is present during the measurements using the microphone. The cap has a member snugly fitting over the receptor of a microphone, the member made of a number of layers of acoustically different materials. Venting is provided to prevent a damage to the membrane of the microphone during the installation and removal of the cap.

REFERENCES:
patent: 2556168 (1951-06-01), Cragg et al.
patent: 4975966 (1990-12-01), Sapiejewski
patent: 5444790 (1995-08-01), Kogen

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