Tuned-Frequency-Spectrum Earpiece for Speech Recognition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earpieces fail to effectively tune the audible-frequency spectrum to improve speech recognition while substantially reducing the intensity of impulse sounds such as gunshots and explosions.
Innovation Solution
A tuned-frequency-spectrum earpiece with a base, sound-attenuation plug, and frequency-spectrum-shaping sound-collection horn that selectively enhances desired frequencies and rejects undesired frequencies, including impulse sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional earpieces are used to block all external sounds, then impulse noise protection is improved, but speech recognition deteriorates
Solution Approach 1:
The earpiece applies different acoustic properties to different frequency ranges: high-frequency impulse sounds are attenuated by the foam plug and filter, while mid-frequency speech sounds are enhanced by the resonant cavity and horn structure. This local differentiation of acoustic treatment resolves the contradiction between blocking harmful impulses and preserving useful speech information.
Solution Approach 2:
The earpiece changes the acoustic parameters of transmitted sound by using a resonant cavity tuned to speech frequencies to amplify mid-range sounds while the foam material and filter structure attenuate high-frequency impulse noises. This parameter transformation allows simultaneous protection from impulses and preservation of speech.
2Loss of information
If frequency-selective filtering is added to earpieces, then speech recognition is improved, but device complexity increases
Solution Approach 1:
The earpiece uses passive acoustic resonance mechanisms rather than electronic filters. A resonant cavity tuned to speech frequencies naturally amplifies desired sounds through acoustic resonance, while the physical geometry of the horn and foam structure provides frequency-selective attenuation. This mechanical/acoustic approach achieves frequency filtering without electronic complexity.
Solution Approach 2:
The resonant cavity and horn structure automatically perform frequency selection through their inherent acoustic properties. The system self-regulates which frequencies are amplified or attenuated based on the physical design of the cavity resonance and horn geometry, eliminating the need for active electronic control or complex adjustable mechanisms.
3Object-affected harmful factors
If impulse noise attenuation is increased, then ear protection is improved, but overall sound quality deteriorates
Solution Approach 1:
The earpiece applies different attenuation levels to different frequency bands: strong attenuation for high-frequency impulses (10 kHz+) using foam and filter structures, minimal attenuation for mid-frequency speech (1-4 kHz) using resonant enhancement, and selective attenuation for low frequencies. This local differentiation preserves sound quality for useful frequencies while providing protection from harmful impulses.
Solution Approach 2:
The earpiece converts the harmful impulse noise into a beneficial signal-to-noise ratio improvement. By selectively attenuating only the harmful high-frequency impulse components while preserving or enhancing mid-frequency speech through resonance, the system transforms the noise-blocking function into a speech-enhancement function, improving both protection and sound quality simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances speech recognition and reduces the intensity of impulse sounds, allowing users to hear desired audio frequencies while blocking unwanted noise.
Implementation Method 1
a first filter device configured to insert into the channel of the base and configured to selectively reject undesired frequencies of the audio frequencies that enter the earpiece
Implementation Method 2
a frequency-spectrum-shaping sound-collection horn operatively coupled to the receiver end of the base and configured to selectively increase a relative amount of desired frequencies of the audio frequencies that enter the inner ear of the user
Data Source
AI summary
A tuned-frequency-spectrum earpiece for selectively tuning audio frequencies that enter an inner ear of a user wearing the earpiece, the earpiece including a base having an emitter end and receiver end, the base including a channel that passes through an entirety of the base; a sound-attenuation plug, wherein the sound-attenuation plug is configured to couple to the base such that the sound-attenuation plug surrounds at least a portion of the channel of the base; a first filter device configured to insert into the channel of the base and to selectively reject undesired frequencies of the audio frequencies that enter the earpiece; and a frequency-selective sound collector operatively coupled to the receiver end of the base and configured to increase an amount of desired frequencies of the audio frequencies that enter the first filter device. Some embodiments increase the amount of sound from some directions while reducing sound from other directions.