Shielded Communication Transducer for Noise-Free Voice Detection
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Summary
Problems
Current speaker-phone systems amplify background noises, such as traffic and engine sounds, which overwhelm the user's voice, reducing the signal-to-noise ratio and occupying unnecessary bandwidth, especially in noisy environments like cars or restaurants.
Innovation solutions
A system utilizing a laser-based interferometer to detect sound waves directly through the skull, employing a quasi-monochromatic, spatially-coherent light beam and a detector to generate an electric signal from the interference of light beams reflected from the body, effectively isolating internal sound signals from external noise.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional microphones are used to detect voice in speaker-phone systems, then the system can capture the user's voice, but background noises are also amplified which reduces the signal-to-noise ratio
Why choose this principle:
The invention extracts only the useful voice signal by detecting vibrations through the skull bone, separating it from background noises. The bone conduction transducer is designed to detect only skull vibrations caused by the user's voice, effectively extracting the desired signal while leaving background noises outside the detection path.
Principle concept:
If conventional microphones are used to detect voice in speaker-phone systems, then the system can capture the user's voice, but background noises are also amplified which reduces the signal-to-noise ratio
Why choose this principle:
The skull bone serves as an intermediary medium that transmits the user's voice vibrations directly to the transducer. This intermediate bone conduction path isolates the voice signal from air-borne background noises, allowing the transducer to detect only the mechanically coupled skull vibrations.
Application Domain
Data Source
AI summary:
A system utilizing a laser-based interferometer to detect sound waves directly through the skull, employing a quasi-monochromatic, spatially-coherent light beam and a detector to generate an electric signal from the interference of light beams reflected from the body, effectively isolating internal sound signals from external noise.
Abstract
A system and method for detecting a sound originating from a body and enhancing signal-to-noise ratio with respect to noise originated outside the body is disclosed. The system comprises a light source for producing a quasi-monochromatic, spatially-coherent light beam; and interferometer for interfering alight beam originated from the source, incident upon the body and reflected from it, with a reference beam, which also originates from the light source; and a detector for detecting changes caused by motion of a least one interference fringe across the detector, and for generation a corresponding electric signal.