Sound Flashcards
Soundwaves etc
Sound is created when an object vibrates against adjacent air particles, True or False?
True
A series of compressions and rarefactions that propagate through a medium is called _____.
Sound
The pitch of a sound is related to it’s frequency, True or False?
True
Velocity determines the loudness of sound, True or False?
False
Pure tone of one frequency is a complex wave, True or False?
False
The speed of sound through air is approx 330m/s, True or False?
True
Human ears can detect sound in a range of approximately 20 Hz to 20kHz, True or False?
True
Human voice is in a range of approximately 100Hz to 10kHz, True or False?
True
Voice range utilized in a phone circuit is approximately 300Hz to 3.4kHz, True or False?
True
Unwanted change to the form of a sound wave is referred to as _____.
Distortion
What is meant by the term distortion?
Unwanted change to the form of a sound wave
What is the medium that carries sound to the ear?
Air
Sound travels as fast as light, True or False?
False
The velocity of sound through seawater is approximately _____.
1490 m/s
The velocity of sound through a steel rod is approximately _____.
5000 m/s
Temperature and density of the medium will effect which component of sound?
Speed/velocity
Sound waves are spherical, True or False?
True
The intensity of a sound wave is _____ proportional to the _____ of its radius.
Inversely, square
What is meant by the Inverse Square Law?
That a sound wave decreases in intensity as they travel over a distance.
0 dB is the threshold of _____.
Hearing
140 dB is the threshold of _____.
Pain
Conversation is around approximately __ dB.
70
