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Exploring Sound-SDY
Vocabulry
Term | Definition |
---|---|
Decibel | Logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity. |
Compression | Reduction in the number of bits needed to represent data. |
Rarefaction | Diminution in the density of something, especially air or a gas. |
Doppler Effect | The change in frequency of a wave. |
Vacuum | A space entirely devoid of matter. |
Frequency | Rate at which a vibration occurs that constitutes a wave, either in a material. |
Hertz | Unit of frequency, equal to one cycle per second. |
Ultrasonic | Involving sound waves with a frequency above the upper limit of human hearing. |
Infrasonic | Denoting sound waves with a frequency below the lower limit of human audibility. |
Echo | A sound or series of sounds caused by the reflection of sound waves from a surface back to the listener. |
Interference | The combination of two or more electromagnetic wave forms to form a resultant wave in which the displacement is either reinforced or canceled. |
Reverberation | Prolongation of a sound; resonance. |
Pitch | The quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone. |
Rhythm | A strong, regular, repeated pattern of movement or sound. |
Oscilloscope | A device for viewing oscillations, as of electrical voltage or current, by a display on the screen of a cathode ray tube. |
Wavelength | The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave. |
Crest | A comb or tuft of feathers, fur, or skin on the head of a bird or other animal. |
Trough | A long, narrow, open container for growing plants or mixing chemicals. |
Kilohertz | A measure of frequency equivalent to 1,000 cycles per second. |
Megahertz | One million hertz, especially as a measure of the frequency of radio transmissions or the clock speed of a computer. |
Echolocation | The location of objects by reflected sound, in particular that used by animals such as dolphins and bats. |