Module 1 Flashcards
As an object vibrates it bumps into the air particles around it. These particles then bump into the particles next to them, and so on and so on. This moving of particles back and forth creates areas of particles that are close to one another known as?
compression
As an object vibrates it bumps into the air particles around it. These particles then bump into the particles next to them, and so on and so on. This moving of particles back and forth creates areas of particles that are farther apart from one another known as?
rarefaction
______ is the number of cycles of vibration completed per second.
a) pitch
b) frequency
c) amplitude
d) phase
b) frequency
We perceive high/low frequencies as high/low ____ sounds.
a) pitch
b) frequency
c) amplitude
d) phase
a) pitch
Frequency is measured in units called?
hertz
_____ refers to the size or magnitude of a sound wave
a) pitch
b) frequency
c) amplitude
d) phase
e) loudness
c) amplitude
*_______is the psychological correlate of amplitude
a) pitch
b) frequency
c) amplitude
d) phase
e) loudness
e)loudness
Sound Definition:There are 3 things that must occur : explain
- Frequency and amplitude of the objects vibration must be within a range that is audible to the listener.
- A substance for the sound to travel through
- a listener
Compression = increase/decrease in pressure?
increase
RAREFACTION= increase/decrease in pressure?
decrease
Sounds that have ONLY ONE FREQUENCY=?
pure tones
Humans have sensitivity to sound over a broad range of sound frequencies –what is that frequency rage?
20 Hz-20,000 HZ)
-Hearing sensitivity is best between ?
2,000 HZ to 5,000 Hz
-Hearing sensitivity is POOR below ?
100 Hz and above 10,000 HZ
-Loudness range of human hearing in decibles: is what?
100 dB from threshold
or the softest sound a person is able to hear, to the level that most people find uncomfortably loud. This is called the dynamic range
The range of the softest sound someone can hear to the level of sound that is unbearable.
is known as?
dynamic range
have multiple frequencies and the pattern REPEATS itself over time.
Periodic Complex waves
have multiple frequencies BUT the pattern DOES NOT REPEAT itself.
Aperiodic complex wave:
indicates a particular point in a wave cycle. It’s expressed in degrees.
phase
When the start of two waves are exactly in phase or 0 degrees out of phase—the amplitude of the combined wave is twice the amplitude of the original waves.
This is known as?
Reinforcement
When the start of two waves are 180 degree out of phase. The amplitude of the combined wave is 0.
This is known as?
cancellation
The peripheral auditory system consists of the
outer ear, the middle ear, and the inner ear.
the outer ear= comprised of the ?
pinna and ear canal
the middle ear= comprised of the
tympanic membrane, the ossicles, the middle ear muscles, the middle ear space, and the Eustachian tube
