Dan Foley from Audio Precision wrote an interesting short article in 2016. A few clips from the article:
- "As he explains, instrumentation noise floor is an overlooked contributor for the reason we are not able to measure a particular audible “distortion,” especially with low sound pressure level (SPL) signals."
- "the reason given as to why a particular audible “distortion” cannot be measured is that the measurement equipment doesn’t have sufficient signal processing capabilities, such as measurement bandwidth or Fast Fourier Transform (FFT) resolution."
article: "Test and Measurement: “I Can Hear It. Why Can’t I Measure It?”"