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Title
Reaktiver Schalldaempfer
Date Issued
2001
Author(s)
Krueger, J.
Leistner, P.
Fuchs, H.V.
Lippold, R.
Patent No
1996-19619466
Abstract
The sound absorber has a sensor (5), such as a microphone, for detecting the sound intensity in the air duct. This is positioned adjacent to the surface of a vibratory membrane (3), forming a part of the wall (1) of the air duct, for detecting the membrane vibration. The signal from the sensor is fed to an amplifier (6), which is coupled on the output side to an electroacoustic transducer (7) within a cavity sealed by the membrane, to produce a controlled vibration of the membrane, and achieve active damping of the sound waves. ADVANTAGE - Provides direct damping of detected sound waves with protection of electroacoustic components from physical and chemical damage.
Language
de
Institute
Patenprio
DE 1996-19619466 A: 19960514