June 20th, 2022 / Vol.24
Evaluate the sound quality considering human hearing characteristics.
In this newsletter, we will introduce the Sound Quality Evaluation Function OS-0525, the new option for O-Solution. This system will help to obtain the invisible sound in the FFT analysis or 1/3 Octave analysis.
When a human listens to a sound, various sensations such as loudness, sharpness, and roughness occur.This function enables to obtain sound quality evaluation indicators that take into consideration the human hearing characteristics and correspond to various sensations of sound.
Case Study: Identifying noise
When time fluctuation noise is inaudible hidden in engine sound after an engine warm-up even though it had been heard before engine warm-up,
the fluctuation strength analysis focused on time fluctuation component is effective to make the noise features clear, which cannot be figured out by the octave analysis. The results of fluctuation strength analysis reflect on the changes of engine sound before/after warm-up.
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