Sound quality analysis objectively quantifies subjective auditory perception by correlating objective acoustic parameters with human subjective feelings, enabling engineers to design acoustic products that sound comfortable, pleasant and even capable of conveying brand value. It is widely applied in product noise evaluation, audio system design, environmental noise control and other fields. Sound quality research explores the complex correlation between sound signals and human auditory perception, going beyond the simple measurement of traditional sound pressure levels. For product manufacturers, mastering this discipline allows them to shape more appealing acoustic characteristics of products and gain competitive edges in the market. This is because superior sound quality is often directly linked to users’ overall perception of product quality.