Karteikarten
Untitled
Karten in diesem Stapel (17)
- 1SoundA form of energy, produced by rapidly vibrating objects, that can be heard by the human ear
- 2InfrasonicAny sound with a frequency lower than the threshold of human hearing (20 Hz)
- 3UltrasonicAny sound with a frequency above the threshold of human hearing
- 4What are all sounds caused byVibrations
- 5What is the human range of hearing20 - 20000 hz
- 6What does sound need for transmission?A material medium- cannot travel through a vacuum
- 7Compressionwhen molecules bump into their neighbors due to a vibration, a steadily moving area of collision (the compression) is created
- 8RarefactionRegion of emptiness into which the displaced air molecules rebound. (Follows a compression outwards)
- 9How does sound travel out from its source?In a longitudinal wave
- 10If an amplitude is larger...The sound is louder
- 11Pitchthe perception of the highness or lowness of a sound; depends primarily on the frequency of the sound
- 12Speed of sound in airV=332(0.59T)
- 13Sound intensitypower of sound per unit (watts/ m^2)
- 14Sound intensity depends on...The vibrational energy of the source
- 15decibel (dB)Unit used to measure the sound intensity level
- 16EchoReflected Sound wave
- 17Diffractionability of waves to move around an obstacle or to spread out after going through a small opening
Informationen
- Beschreibung
- Karteikarten am Untitled, erstellt von veralee.art am 23/11/2013.
- Erstellt von
- veralee.art
- Aufrufe
- 6
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