Acoustic Characteristic Adjustment Using Reference and Comparative Sounds
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Solution Overview
Problem
Current sound reproducing devices face challenges in accurately adjusting acoustic characteristics for individual users, leading to unnatural sound experiences due to complex and time-consuming equalization processes that often result in unintended frequency characteristics.
Innovation Solution
A sound reproducing device and method that includes a sound source data storage unit, reproduction processing unit, comparative sound volume adjustment operation unit, and acoustic characteristic information generation unit, allowing simultaneous output and recording of reference and comparative sounds to facilitate easy sound volume adjustments and computation of acoustic characteristics based on user operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If auditory-perceptive acoustic characteristics are adjusted by alternately reproducing comparative sound and reference sound and adjusting sound volume through trial and error, then acoustic characteristic adjustment is achieved, but the operation becomes complex and time-consuming
Solution Approach 1:
The system pre-generates multiple types of comparative sounds (first, second, third comparative sounds) with different frequency characteristics before the actual adjustment operation. This preliminary preparation eliminates the need for trial-and-error generation during adjustment, allowing users to directly select and compare appropriate sounds, thereby reducing adjustment time while maintaining accuracy.
Solution Approach 2:
The system introduces an acoustic characteristic adjustment information generation unit that acts as an intermediary between the sound output unit and the user. This unit automatically generates and manages multiple comparative sounds based on the reference sound, facilitating easier comparison and adjustment without requiring users to perform complex trial-and-error operations themselves.
2Reliability
If equalization is performed to smooth auditory-perceptive acoustic characteristic and clarify sound image, then sound quality is improved, but the frequency characteristic may deviate from the original reproduced sound
Solution Approach 1:
The system applies equalization selectively to specific frequency bands rather than uniformly across all frequencies. By dividing the frequency spectrum into multiple bands and applying different adjustment levels to each, the system improves sound quality in problematic frequency ranges while preserving the overall character and original frequency characteristics of the reproduced sound.
Solution Approach 2:
The system provides feedback to users by allowing them to listen to and compare the reference sound with multiple types of comparative sounds generated through different equalization settings. Users can select the level of equalization that achieves desired sound quality improvement while maintaining acceptable fidelity to the original frequency characteristics.
3Ease of operation
If multiple types of comparative sounds are generated and output simultaneously for user selection, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The system segments the frequency spectrum into multiple bands and generates comparative sounds for each band separately. This segmentation allows the system to manage complexity by handling one frequency band at a time while still providing comprehensive comparison options across the entire frequency spectrum, improving ease of operation without overwhelming system complexity.
Solution Approach 2:
The acoustic characteristic adjustment information generation unit is designed to universally generate multiple types of comparative sounds (first, second, third comparative sounds) from a single reference sound. This multi-functional unit can adapt to different adjustment needs and frequency bands, reducing overall system complexity by consolidating sound generation functionality into a single versatile component.
Data Source
AI summary
A sound reproducing device having: a sound source data storage unit configured to store reference sound source data for reproducing a reference sound having a prescribed frequency band and comparative sound source data for reproducing comparative sounds having frequency bands different from each other; a reproduction processing unit configured to reproduce the reference sound and the comparative sounds on the basis of the reference sound source data and the comparative sound source data stored in the sound source data storage unit; a comparative sound volume adjustment operation unit configured to receive sound volume adjustment operation for the comparative sounds; and an acoustic characteristic information generation unit configured to simultaneously output the reference sound and a comparative sound of a sound volume in accordance with the received sound volume adjustment operation and record a result of the sound volume adjustment operation in association with the comparative sound related to reproduction.