Rubin- Sound chapt. 11
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22 terms
Terms | Definitions |
|---|---|
 Sound waves are caused by | vibrations |
| Your hearing can be damaged by | high-intensity sounds |
| The intensity of a sound is determined by its | amplitude |
| Nina listens to an ambulance as it travels past her. The sound of the siren | decreases in pitch |
| The sound of your voice is produced by the | force of air making your vocal cords vibrate |
| Jorge wants to make the pitch of a sound wave lower. He should | decrease its frequency |
| Brian turns up the volume on his stereo. The stereo sends an electrical signal to the speakers. The signal changes the sound's | intensity |
| To raise the pitch of the sound caused by a sound wave, | increase the frequency of the sound |
| A sound wave has a frequency of 300 hertz. How many complete wavelengths of this wave pass a fixed point in one second? | 300 |
| Anna plays a note on a clarinet. Fred plays the same pitch on a violin. The two notes sound different. This is because the two notes have different | overtones |
| Sound becomes softer at a distance because the | energy of the sound wave is spread over a greater area, decreasing its intensity |
| A car's muffler and some kinds of acoustical tile make sounds softer by | absorbing energy from sound waves |
| Intense sounds can damage your hearing by | damaging the hair cells of the cochlea |
| A mechanical wave always transfers energy | through a medium |
| The frequency of a wave is measured in | hertz |
| Sound travels faster in materials that are | denser |
| If you compare the sound of a motorcycle being driven toward you to the sound of the same one being driven away, you are hearing the | Doppler Effect |
| The bones of the middle ear | carry vibrations from the eardrum to the inner ear |
| When you speak, your | vocal cords vibrate to produce sound |
| A sound wave transfers kinetic energy between particles by | compressing them |
| Sound waves can not travel through a | vacuum |
| As the temperature of the medium increases, the speed of sound | increases |
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