Ask AI: Explain how the just noticeable difference for intensity (in dB) varies with pure tone intensity. Does this also depend on frequency?

The just noticeable difference (JND) for intensity in decibels (dB) is the smallest difference in sound level that one can reliably detect. It is a logarithmic measure of sound intensity and has been found to behave differently as a function of pure tone intensity. It increases as the tone intensity increases, but does not increase at the same rate for all frequencies. The JND for higher-frequency tones tends to increase faster than that for lower-frequency tones, meaning that the same level difference will be more noticeable at higher frequencies than at lower frequencies. The JND also varies with background noise levels; higher background noise can make lower level intensity differences less noticeable.