註(from chatgpt):
When using -20 dBFS pink noise for calibration, the reference level for a sound pressure level (SPL) meter typically follows industry standards. In this context, -20 dBFS is often used as the reference level for digital audio systems. The reference SPL level associated with -20 dBFS pink noise will depend on the specific calibration standards you are following, but a common reference is:
- For -20 dBFS pink noise: 85 dB SPL (Sound Pressure Level) at the listening position when measured using a calibrated SPL meter.
This reference level is widely used in audio testing and calibration to ensure consistent playback levels in digital audio systems. However, it's essential to confirm the reference level according to the specific standards or requirements of your application or industry, as it can vary in certain contexts.