Lesson 15 Flashcards
Sound cannot travel through the following medium or mediums
vacuum
Any complex sound can be broken down into individual frequencies by a technique known as
Fourier spectral analysis
How many octaves occur from 125 H to 2000 Hz?
4 octaves
The quality or timbre of a sound is a property that depends on
how many frequencies are in the complex sound, the relative strength of each frequency, the resonance of the sound cavities (all of the above)
The speed of sound in air, in feet per second is
1100
What does the term “67 dB “ mean?
it is meaningless without a reference level
The decibel is
a ratio between two intensities
The weakest sound normal human ears can hear in the most sensitive frequency range of the ear is an effective sound pressure of about
0.0002 dynes/cm squared
A formant is
a frequency region within a complex tone where certain harmonics have relatively large energy
The normal human ear canal resonance is in the approximate range of
2500-4000 Hz
