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Waves & Sound
Chapters 9-10 Physical Science
| Question | Answer |
|---|---|
| Wave | Repeated disturbance that transfers all forms of energy through matter |
| Medium | Physical environment through which a wave can travel |
| Mechanical Wave | A wave that requires a medium through which to travel |
| Radio Waves | Light waves, not sound waves; our eyes can't see them |
| Amplitude | The maximum displacement from the equilibrium |
| Period | The time it takes a complete cycle to occur |
| Frequency | The number of cycles of vibrations of a single traveling pulse |
| Pulse Wave | A wave that consists of a single traveling pulse |
| Periodic Wave | A wave formed by the periodic motion of a wave source |
| Transverse Wave | A wave whose particles vibrate perpendicularly to the direction the wave is traveling |
| Longitude Wave | Matter in the medium that moves back and forth in the same direction |
| Trough | Lowest point below the equilibrium |
| Crest | Highest point above the equilibrium |
| Wavelength | Distance between trough to the next trough or the crest to the next crest |
| Seismic waves | Waves produced during earth quicks |
| Richter Scale | Scale used to measure the amplitude of seismic waves |
| Compression/Longitude Wave | Wave whose particles vibrate parallel to the direction the wave is traveling |
| Compression | Region of a longitudinal wave in which density and pressure are at the maximum |
| Rarefaction | Region of a longitudinal wave in which density and pressure are at the minimum |
| Reflection | Waves bouncing off of an object |
| Refraction | the bending of waves when they pass from one medium to another |
| Diffraction | The bending of waves as they go around a barrier |
| Superposition /Interference | The combo of two overlapping waves |
| Constructive Interference | occurs when waves add together and overlap |
| Destructive Interference | Occurs when waves subtract from on another when they overlap |
| Standing Wave | a wave which oscillates in time but whose peak amplitude profile does not move in space. |
| Node | A point in a standing wave that maintains zero displacement |
| Antinode | The position of maximum displacement in a standing wave system. |
| Sound Waves | Vibration make sound |
| Eardrum | Also know as the tympanic membrane |
| Cochlea | The spiral cavity of the inner ear which produces nerve impulses in response to sound vibrations |
| Outer Ear | Collects sound for the ear |
| Middle Ear | Amplifies sound in the ear |
| Doppler Effect | An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other. |
| Ultrasonic Waves | Sound waves with frequency over 20,000 Hz |
| Subsonic Waves | Sound waves slower than the speed of sound |
| Pitch | How high or low a sound seems to be, depending on the frequency of the sound |
| Supersonic waves | Faster than the speed of sound |
| Sonic Boom | Loud sound made when an object moves faster than the speed of sound |
| Intensity | the amount of energy that goes through a certain area in a specific amount of time |
| Loudness | Is the human perception of sound volume and primarily depends on the sound intensity |
| Decibel | SI unit of intensity |
| Music | Is any collection of sounds that has a pattern |
| Overtone | A(n) ________ is a vibration whose frequency is a multiple of the fundamental frequency |
| Resonator | A(n)________ is a hollow chamber filled with air that amplifies sound when the air inside of it vibrates |
| Sonar | a system that uses the reflection of underwater sound waves to detect objects |
| Reverberation | In theaters they line the walls with padding to control ____________ |
| Resonance | the quality or state of being resonant |
Created by:
andrewfassbinder
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