Nature of Sound Chapter Two
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28 terms
Terms | Definitions |
|---|---|
 Sound Wave | a lonitudinal wave that is caused by vibrations and that travels trhough a material medium |
| Medium | A physical enviroment in which phenomena occur |
| Pitch | a measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave. |
| Doppler Effect | am observed change in the frequency of a wave then the source or observer is moving. |
| Loudness | The extent to which a sound can be heard |
| Decibal | the most common unit to measure loudness |
| Echo | a reflected sound wave |
| Echolocation | The process of using reflected sound waves to find objects;used by animals such as bats |
| Interference | The combinationof two or morewaves that results in a single wave. |
| Sonic Boom | The exsplosive sound heard when a shock wave from an object traveling faster than the speed of sound reaches a person's ears. |
| Standing Wave | A pattern of vibration that stimulates a wave that is standing still. |
| Resonance | A phenomenon that occurs when two objects naturally vibrate at the same frequency;the sound produced by one object causes the other object to vibrate. |
| Sound Quality | the result of the blending of several pitches through interference |
| Noise | a sound that consists of a random mix of frequencies |
| Electromagnetic Wave | a wave that consists of electric and magnetic fields that vibrate at right angles to each other. |
| Radiation | the transfer of energy by electromagnetic waves |
| Electromagnetic Spectrum | All of the frequencies or wavelengths of electromagnetic radiation |
| Reflection | the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through |
| Absorbtion | the transfer of energy from light waves to particles of matter |
| Scattering | an interaction of light with matter that causes light to change its energy, direction of motion, or both |
| Refraction | The bending of a wave as it passes at an angle from one medium to another |
| Diffraction | a change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening |
| Interference | the interaction between waves that meet` |
| Transmission | the passing of light through matter |
| Transparent | allows light to pass through so that whatever is behind can be seen |
| Translucent | Permitting light to pass through, but not transparent. |
| Opaque | impossible to see through |
| Pigment | a substance that gives another substance or a mixture its color |
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