Adaptive Masker Sound Generation for Noise Comfort
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Solution Overview
Problem
Existing masker sound generation technologies fail to provide a comfortable sound environment by generating masker sounds regardless of the noise level in the sound collection space, leading to potential discomfort from increased sound pressure.
Innovation Solution
A masker sound generation device that includes an obtainer for collecting sound signals, a detector to measure noise levels, and generators for producing first and second masker sound signals. These signals are synthesized and outputted to create an optimal equivalent noise level, reducing noise impact and providing a comfortable environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If masker sound is generated without considering noise level, then the sound environment is maintained, but sound pressure becomes excessively high causing discomfort
Solution Approach 1:
The masker sound generation device dynamically adjusts the sound pressure of masker sounds based on real-time noise level detection. The system transitions from static fixed sound pressure to dynamic adaptive sound pressure, where the masker sound pressure is adjusted according to the detected noise level to maintain comfort while effectively masking noise.
Solution Approach 2:
The system changes the sound pressure parameter of the masker sound signal based on the detected noise level. By varying the sound pressure parameter dynamically, the system optimizes the balance between noise masking effectiveness and listener comfort, preventing excessive sound pressure while maintaining adequate masking.
2Object-affected harmful factors
If high sound pressure masker sound is generated, then noise masking effectiveness increases, but listener comfort decreases
Solution Approach 1:
The system incorporates feedback through noise level detection that continuously monitors the acoustic environment and adjusts the masker sound parameters accordingly. This feedback mechanism ensures that the masker sound provides effective noise masking while maintaining listener comfort by adapting to changing environmental conditions.
Solution Approach 2:
The masker sound generation transitions from static to dynamic operation, where the sound pressure is continuously adjusted based on real-time noise level detection. This dynamic adjustment allows the system to optimize the balance between masking effectiveness and listener comfort across varying environmental conditions.
Data Source
AI summary
A masker sound generation device includes: an obtainer that obtains a collected-sound signal generated through sound collection by a microphone; a detector that detects, based on the collected-sound signal, a noise level in a sound collection space where the microphone is disposed; a first generator that generates a first masker sound signal according to the noise level; a second generator that generates, according to the noise level, a second masker sound signal having a sound pressure higher than a sound pressure of the first masker sound signal in a frequency band higher than a first frequency; a synthesizer that synthesizes the first masker sound signal and the second masker sound signal to generate a synthesized masker sound signal; and an outputter that outputs the synthesized masker sound signal to a loudspeaker that emits sound into a sound emission space.