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US 8,948,418 B2Granted
Noise masking communications apparatus
AssigneePlantronics, Inc.
InventorOsman K. Isvan
Life of this patent
Estimating the term…
Abstract
A communications headset has a microphone boom that is moveable through various distances from the user's mouth, in which movement of the boom operates electrical, mechanical or acoustic mechanisms to adjust the transmit sensitivity of the headset such that the ratio of the amplitude of the output signal of the headset to the amplitude of the sound pressure at the vicinity of the user's mouth is maintained relatively constant, independently of the position of the microphone boom.
Claims21
A headset capable of applying a change in amplitude to an
- input signal, the headset comprising:
- a main body locatable at a given distance from a desired acoustic source;
- a boom, movably coupled to the main body and adapted to be positioned in at least a first position and a second position relative to the desired acoustic source;
- a microphone, wherein the microphone is active when the boom is in the first position and second position;
- an acoustic sensing point, acoustically coupled to the microphone, wherein the acoustic sensing point is disposed at different distances from the desired acoustic source when the boom is in at least the first position or the second position;
- and
- an electrical controller, operably coupled to the boom, for applying a different change in amplitude to the input signal dependent on whether the boom is in the first position or second position without moving the main body relative to the desired acoustic source.
4 more elements
A headset for providing an output signal that is derived from an acoustic source, comprising:
- a main body;
- a boom, movably coupled to the main body and adapted to be positioned in at
- least a first position and a second position relative to the main body;
- a microphone, wherein the microphone is active when the boom is in the first position and second position;
- and
- an electric controller that is operabiy coupled to the boor land that is responsive to moving the boom from the first position to the second position, for applying a different gain to the output signal dependent on whether the boom is in the first position or the second position.
3 more elements
Dependencies are inferred from the claim text.