SNDRI

SNDRI, or Signal-to-Noise and Distortion Ratio Improvement, is a metric used to evaluate the performance of audio equipment, particularly in the context of digital-to-analog converters (DACs) and audio amplifiers. It is an extension of the traditional Signal-to-Noise Ratio (SNR), which measures the level of desired signal relative to the background noise. However, SNDRI takes into account not only the noise but also the distortion introduced by the equipment.

The SNDRI is calculated by measuring the power of the desired signal, the noise, and the distortion, and then using these values to compute a ratio. A higher SNDRI indicates better performance, as it means that the equipment is introducing less noise and distortion relative to the desired signal.

SNDRI is particularly important in high-fidelity audio systems, where even small amounts of noise and distortion can be audible and detrimental to the listening experience. It is also used in the design and optimization of audio equipment to ensure that it meets the desired performance standards.

In summary, SNDRI is a crucial metric for evaluating the performance of audio equipment, providing a more comprehensive assessment than SNR alone by including distortion in its calculation. It is widely used in the audio industry to ensure that equipment meets high standards of audio quality.