A Teaching Assistant (TA) earns an average salary of $21,548 per year. A skill in Childhood Education is associated with high pay for this job.
Medical Definition of place theory. : a theory in physiology: the perception of pitch results from the ability of sounds of different pitch to stimulate different areas of the organ of Cortiâcompare telephone theory.
Thus, the volume is proportional to the amplitude of the sound wave. The frequency of a sound wave is perceived as pitch. Humans can detect pitches within the acoustic range of 20 to 20,000 Hz, but we can't detect ultrasound or infrasound.igh-pitched notes have a high frequency, while low-pitched notes have a low frequency. The difference in pitch between Middle C and Concert A is a difference of 178 Hz. Humans can typically hear sounds as low as 20 Hz, and as high as 20,000 Hz. This range is known as the acoustic range of sound.