The unit of measurement related to the pitch of sound. It is the number of cycles or number of complete vibrations in one second. Frequency is now expressed in Hertz (Hz). (It used to be expressed in cycles per second [CPS].) The more cycles per second, the higher the pitch. Human ears normally can hear sounds […]

The base of the tiny stirrup (stapes) bone which rests on the oval window in the middle ear.

This is the government agency responsible for approving and regulating drug use in the USA.

See Frequency Modulation system.

Using hand-shapes to represent the letters of the alphabet in order to spell out words. Fingerspelling is a part of all signed languages, including American Sign Language.

Acoustically, a device that allows the passage of certain frequencies and attenuates others.