Have you ever looked at a piano keyboard and wondered why the notes of an octave were divided up into seven white keys and five black ones? After all, the sounds that lie between one C and another ...

This is a preview. Log in through your library . Abstract In order to be heard over the low-frequency energy of a loud orchestra, opera singers adjust their vocal tracts to increase high-frequency ...

IT has been known for some time that vowels are distinguished from one another mainly by the frequencies of the formants or regions of the auditory spectrum in which there is a comparatively large ...