Wikipedia equal loudness contours
An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a constant loudness when.
The curves you can see here are very old curves of from Fletcher-Munson. The refined Robinson-Dadson loudness curves are now new standardised by. This is an equal loudness contour.
If you're an audio engineer, you should know this.
At high frequencies, headphone measurement gets unreliable, and the various resonances of pinnae outer ears and ear canals are severely affected by proximity to the headphone cavity.
It would be great if anyone did Running a sweep at 90 or dB SPL, though not particularly dangerous over 20 seconds, is not something I want to repeat too often with the ear canal open. However, when more than one critical band is stimulated, the signals to the brain add the various bands to produce the impressions of loudness. This work also investigated the response of human hearing to tone-bursts, clicks, pink noise and a variety of other sounds that, because of their brief impulsive nature, do not give the ear and brain sufficient time to respond.
Jimw talk1 March UTC.
An equal-loudness contour is a measure of sound pressure, over the frequency spectrum, for which a. In many discussions on the Bose Pro Portable PA Community you will see references to Equal Loudness Curves (Contours). For the performing.
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However, the ISO report actually lists the latter as using "compensated" headphonesthough it doesn't make clear how Robinson-Dadson achieved "compensation". Running a sweep at 90 or dB SPL, though not particularly dangerous over 20 seconds, is not something I want to repeat too often with the ear canal open.
Equal-loudness curves derived using headphones are valid only for the special case of what is called side-presentationwhich is not how we normally hear. I put this down to the fact that any leakage around hair etc adds damping to the driven cavity, and so I consider results actually on my real head to be the best.
Video: Wikipedia equal loudness contours Equal-loudness contour - Wikipedia audio article