1. Frequency response
The frequency response refers to the frequency range during playback of the audio equipment and the amplitude of the sound wave as a function of frequency. Generally, this indicator is measured with a frequency range of 1000 Hz, and the amplitude is expressed in decibels (dB). The drop frequency is measured.
The overall frequency response of the sound system is theoretically required to be 20 to 20000 Hz. However, due to the structure of the circuit and the quality of the components, the requirements are often not met under normal circumstances, but generally at least 32 to 18000H is required.
2. Signal to noise ratio
The signal-to-noise ratio is the ratio of the sound reproduction of the sound system software to the new noise generated by the entire system. Generally, this index is expressed as the logarithmic ratio (dB) of the rated output power of the playback signal and the system noise output power when there is no signal input. The signal-to-noise ratio of the general audio system needs to be above 85 dB.
3. Dynamic Range
The dynamic range is the logarithm of the ratio of the maximum undistorted output power to the system noise output power during static playback, in decibels (dB).
Distortion means that some parts of the original source signal have changed after the audio system replays the source signal.
5. Stereo Separation
Stereo separation represents the isolation between the left and right channels in a stereo system, which actually reflects the degree of crosstalk between the left and right channels.
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