Sound Pressure Level Distribution Visualization for Audio Recording
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Solution Overview
Problem
Users can only know the instantaneous maximum sound pressure with existing peak level meters, lacking information on sound pressure level distribution and recordable range, especially when converting high to low quantization bit depth for recording.
Innovation Solution
A display control device and method that displays sound pressure level distribution and recordable range corresponding to quantization bit depth during recording, using a control unit to visualize this information on a display unit, allowing users to set appropriate recording settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If only peak level is displayed, then the display is simple, but the user cannot know the sound pressure level distribution and recordable range
Solution Approach 1:
The sound pressure level distribution is segmented into multiple levels (e.g., -60dB to 0dB in 20dB intervals) and displayed as distinct regions. Each segment represents a different sound pressure range, allowing users to understand the distribution without overwhelming complexity.
Solution Approach 2:
The display transitions from one-dimensional peak level indication to two-dimensional visualization by adding sound pressure level as a vertical dimension and frequency or time as the horizontal dimension, creating a comprehensive distribution map.
2Quantity of substance
If quantization bit depth is reduced for recording, then the recording capacity increases, but the recordable range decreases
Solution Approach 1:
The system performs preliminary analysis of the sound pressure level distribution before recording and displays the predicted recordable range. This allows users to adjust recording settings in advance to optimize both capacity and precision for the specific audio content.
Solution Approach 2:
The display provides feedback about the relationship between quantization bit depth and recordable range, showing users how different bit depths will affect the recording of their specific audio material. This enables informed decision-making about recording parameters.
Data Source
AI summary
A display control device includes a control unit that displays a sound pressure level distribution of predetermined sound data and a recordable range corresponding to a quantization bit depth during recording of the sound data on a display unit.