Loudspeaker panel with a microphone and method for using both
First Claim
1. A loudspeaker panel with a common open housing including several loudspeakers arranged in a plane such that the loudspeaker panel forms a dipole having a directional sound pressure characteristic, wherein an axis of symmetry of each loudspeaker is arranged in z-direction perpendicular to said plane and wherein to said housing a single microphone is attached outside said housing and on said plane.
3 Assignments
0 Petitions
Accused Products
Abstract
In public audio presentation it is desirable that the playback loudness is continuously adapted to the background noise loudness. Such adaptation of the playback volume requires a continuous measurement of the loudness somewhere within the sound exposure area. A dipole loudspeaker panel has a strong attenuation of the emitted sound in the panel plane. When placing a microphone capsule in that plane but outside the panel, the sound emitted from the panel will be recorded by the microphone with a significant sound pressure level attenuation. Such specific microphone arrangement can capture the background noise without being unduly disturbed by the direct sound emitted from the loudspeakers.
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Citations
10 Claims
- 1. A loudspeaker panel with a common open housing including several loudspeakers arranged in a plane such that the loudspeaker panel forms a dipole having a directional sound pressure characteristic, wherein an axis of symmetry of each loudspeaker is arranged in z-direction perpendicular to said plane and wherein to said housing a single microphone is attached outside said housing and on said plane.
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4. A method for using a loudspeaker panel for audio presentation, said loudspeaker panel having a common open housing including several loudspeakers arranged in a plane such that the loudspeaker panel forms a dipole having a directional sound pressure characteristic, wherein an axis of symmetry of each loudspeaker is arranged in z-direction perpendicular to said plane and wherein to said housing a single microphone is attached outside said housing, said method comprising:
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capturing background noise with said microphone; capturing a loudspeaker signal with said microphone; using a microphone output signal for controlling a sound pressure level output from said loudspeakers. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification