Lesson 1430 of 1524
Sound
The speed of sound depends on the medium and the state of the medium
Practice this chapterThe speed of sound depends on the medium and the state of the medium In air, the speed of sound is related to air temperature T by v = 331 m s T K 273 K = 331 m s 1 + T C 273 ° C .
Sound is a disturbance of matter (a pressure wave) that is transmitted from its source outward. Sound can be modeled in terms of pressure or in terms of displacement of molecules
sound — traveling pressure wave that may be periodic; the wave can be modeled as a pressure wave or as an oscillation of molecules. speed of sound — related to air temperature T by v = 331 m s T K 273 K = 331 m s 1 + T C 273 ° C. human ear — sensitive to frequencies between 20 Hz and 20 kHz. shock wave — wave front that is produced when a sound source moves faster than the speed of sound.
Worked example
What does “sound” mean in Sound?
- 1Use the wording this chapter gives for sound.
- 2The book says: traveling pressure wave that may be periodic; the wave can be modeled as a pressure wave or as an oscillation of molecules.
- 3Do not use the meaning of speed of sound. That term means related to air temperature T by v = 331 m s T K 273 K = 331 m s 1 + T C 273 ° C.
Result: traveling pressure wave that may be periodic; the wave can be modeled as a pressure wave or as an oscillation of molecules
Why. That is the meaning this chapter gives for sound.
Do not swap sound and speed of sound. sound means traveling pressure wave that may be periodic; the wave can be modeled as a pressure wave or as an oscillation of molecules. speed of sound means related to air temperature T by v = 331 m s T K 273 K = 331 m s 1 + T C 273 ° C.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.