Noise canceling microphone with visual feedback
AssigneeMotorola, Inc.
InventorsMehrdad Badie, Daniel M. Nigro, Vahid Kazem-Gourdarzi
Life of this patent
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Abstract
Briefly, according to the invention, a noise-cancelling microphone apparatus (400) is disclosed. The microphone (400) comprises a sound transducer (106) for converting sound waves to electrical signals and means for substantially preventing ambient noise from being converted to electrical signal. A circuit (100) is provided for determining the level of noise not prevented form being converted to electrical signal. The microphone (400) further includes a display (148) for indicating when the level of the ambient noise being converted to electrical signal is above a predetermined level.
Claims15
A directional microphone, comprising:
- transducer means for converting sound waves to electrical signals, said transducer means having means for substantially preventing ambient noise from being converted to electrical signals;
- means for determining the level of the ambient noise not prevented from being converted to electrical signal;
- and
- indicator means for indicating when the level of the ambient noise being converted to electrical signal is above a pre-determined level.
A portable microphone apparatus:
- a microphone element for converting sound waves to electrical signals, the microphone element having a first and a second port operating in combination to substantially prevent the ambient noise from being converted to electrical signals;
- means for determining the level of the ambient noise being treated as sound waves and being converted to electrical signals;
- comparison means for comparing the level of the ambient noise being converted to electrical signal to a predetermined level;
- and
- display means for displaying the result of the comparison means.
A communication device, comprising:
- transmitter means for transmitting a signal;
- microphone means coupled to the transmitter means for converting sound waves to electrical signals, the microphone means including:
- transducer means for directionally converting sound waves, including noise, to electrical signals, the electrical signals having a purity level depending on their noise components;
- means for sensing when the noise components of the electrical signals are above a pre-determined level;
- and
- means for visually displaying the level of the noise components in the electrical signal.
Dependencies are inferred from the claim text.