Voice Frequency Adjustment for Ambient Noise Interference

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing sound playing devices struggle to effectively filter out ambient noise while maintaining clear voice signals, often requiring costly noise shielding methods that are not feasible with speakers.

Innovation Solution

A method and device that detect ambient noise frequencies and adjust the voice frequency range of input voices to avoid interference, using a voice acquisition module, noise detector, noise analysis module, and voice processing module to modify the voice before playback, employing techniques like frequency compressing or shifting to minimize noise impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If noise shielding methods are used to block external noise, then noise interference is reduced, but cost increases significantly

Engineering Contradiction:

Improvenoise interferenceVSAvoidcost

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent changes the frequency parameter of the voice signal to avoid noise interference. The voice processing module shifts the voice frequency to a non-disturbed range, transforming the original frequency parameter into a new frequency that bypasses the noise frequency range, thereby reducing noise impact without physical shielding

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical noise shielding system with a signal processing system. Instead of using physical barriers to block noise, the system uses digital signal processing to detect noise frequency ranges and dynamically adjust voice frequency, substituting mechanical protection with electronic/frequency-based protection

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If frequency shifting is applied to avoid noise, then voice clarity is improved, but voice quality may be distorted

Engineering Contradiction:

Improvevoice clarityVSAvoidvoice quality

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent applies partial frequency shifting only to the extent necessary to move the voice frequency out of the noise frequency range. The voice processing module determines the minimum frequency adjustment needed to achieve clarity without excessive distortion, applying just enough frequency transformation to resolve the interference while preserving voice quality

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements dynamic frequency adjustment where the voice frequency is continuously adapted based on the detected noise environment. The system dynamically determines the optimal frequency shift in real-time, allowing the voice frequency to change adaptively rather than using a fixed shift, thereby maintaining voice quality while ensuring clarity

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11367457B2Method for detecting ambient noise to change the playing voice frequency and sound playing device thereof

Publication Date: 2022.06.21 AIROHA TECHNOLOGY CORPORATION

AI summary

A method for detecting ambient noise to change the playing voice frequency and a sound playing device thereof are disclosed. The method includes the following steps: obtaining an input voice; detecting an ambient noise, and analyzing a noise frequency range of the ambient noise; determining whether a consonant frequency range of the input voice falls within the noise frequency range; if yes, adjusting the frequency of the consonant of the input voice to avoid the noise frequency range to form a modified voice; and playing an output voice, wherein the output voice includes the modified voice.