Shea on Frequency:

• The number of occurrences of a wave per second
• The unit for frequency is Hertz (Hz)
• 20 kHz is shorthand for 20,000 Hz
• Audible frequency range is 20 Hz to 20 kHz
• What is perceived as â??pitchâ?? is determined by the frequency of the sound wave
• Male voice: 100 Hz to 8 kHz
• High female voice: 180 to 10 kHz

• Low frequencies in the natural world: distant thunder, earthquakes, other natural catastrophe. Low frequency rumble often denotes a threatâ?¦ thus the four bass notes as the sharkâ??s theme in Jaws.
• High frequency: sometimes associated with serenity, peacefulness
• Infrasonic: below 20 Hz. Frequencies around 12 Hz can cause nausea. \'\'This was not the case when \'\'Mythbusters\'\' tested it.\'\'
• Ultrasonic: Frequency region above 20 kHz. Have to watch very high frequency sounds on a set (e.g. video monitors that emit strong acoustic energy at around 16,000 Hz)

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The Relationship between frequency and wavelength is this: Wavelength is the measurement of a sound wave from the apex of one wave to the apex of the next. This corresponds to frequency in that the shorter the wavelength, the higher the frequency.