Audio quality is a comprehensive metric that evaluates the overall performance of audio recording, processing, transmission and playback. It covers clarity, intelligibility, naturalness, loudness, timbre and overall auditory experience. Affected by signal processing, transmission conditions and hardware capabilities, its evaluation criteria vary according to different application scenarios.

Subjective Evaluation
It centers on end-user auditory experience, widely adopted to assess the overall listening performance of audio devices such as speakers and headsets, as well as the artistic appeal and appreciation value of music, film audio and other audio content.
For instance, comprehensive subjective feedback from multiple users determines whether a headset meets people’s audio expectations for daily music playback and video watching.

Objective Evaluation
Mainly deployed in R&D, production and professional audio engineering. It precisely measures technical indicators of audio equipment to verify compliance with standards and design specifications, and analyzes the performance of audio signal processing algorithms.
In speaker manufacturing, objective testing quantifies parameters including frequency response and distortion to check product quality and support subsequent tuning and optimization.