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8 - Mod 3 Lesson 3
Energy & Sound
| Term | Definition |
|---|---|
| Acoustics | The science of sound |
| Amplification | the maximum displacement on either side of the equilibrium (midpoint) position. |
| Compression | The part of a longitudinal wave where the particles of the medium are close together. |
| Compression wave | (longitudinal wave)- a wave in which the particles of the medium vibrate parallel to the direction of wave motion |
| Crest | Highest point of a wave |
| Decibel | Unit of sound intensity |
| Density | The ratio of mass versus volume |
| Doppler Effect | When sound waves of an object moving relative to the observer take on a different frequency than if they were stationary. |
| Frequency | the number of complete wavelengths that pass a point in a given time |
| Inner ear | Inner most part of the ear that contains the cochlea and nerve endings |
| Intensity | The loudness of sound |
| Mach I | An object reaches this point when it breaks the sound barrier |
| Medium | A substance that a wave can travel through |
| Middle ear | The part of the ear that contains the ossicles (ear bones) |
| Outer ear | The part of the ear that receives sound input from the outside world |
| P wave | Primary compression wave that occurs during an earthquake |
| Pitch | The high or low effect of sound based on frequency |
| Rarefaction | a part in a longitudinal wave where the particles of the medium are spread apart |
| S wave | The transverse wave associated with an Earthquake |
| Seismograph | An instrument that records seismic waves |
| Sonic Boom | The release of a massive sound wave that occurs when an object breaks the sound barrier |
| Sound barrier | The point at which an object exceeds the speed of sound |
| Sound wave | A compression wave that carries energy to a natural or artificial device that can detect pressure changes |
| Speed of sound | 343.2 meters per second or 1,126 ft/s. This is equivalent to 1,236 kilometers per hour or 768 mph |
| Supersonic | An object that can break the sound barrier |
| Tinnitus | Ringing or hissing in the ear as a result of listening to high-frequency or high-intensity sounds |
| Trough | Lowest point of a wave |
| Transverse wave | a wave whose particles oscillate perpendicular to the direction that the wave travels |
| Wavelength | the distance from any point on a wave to an identical point on the next wave |
Created by:
Ms. Greenup
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