Sounds Flashcards
Hearing range of a child
20 - 24,000 Hz
Hearing range of a middle aged man
20 - 16,000 Hz
Hearing range of an old man
20 - 8,000 Hz
Longitudinal mechanical waves and is associated with the sense of hearing.
Sound
Where does sound comes from?
A source
This is transferred from the of source of the sound.
Energy
Sound can be detected through these.
By an ear or an instrument.
Fluctuations in pressure within normal atmospheric pressure
Sound Waves
High pressured sound waves
Compressions
Low pressured sound waves
Rarefactions
This determines how loud or soft a sound is perceived to be
Loudness
Loudness is related to the perception of sound by whom?
A listener
The greater the pressure amplitude of a sinusoidal sound wave,
the greater the perceived loudness
This is measured in decibels.
Intensity (Loudness)
A description of how high or low the sound seems to a person.
Pitch
Pitch is dependent on what?
The frequency of the sound.
Sound waves with frequencies above the normal human range of hearing. Ranging from 20-100,000 Hz.
Ultrasound
Sounds with frequencies below the normal human range of hearing. Ranging from 20-200 Hz.
Infrasound
This depends on the number and relative amplitude of the other standing wave frequencies that makes up the complex sound wave.
Quality
What do you call the difference in sound?
Tone color, quality or timbre.
The time average rate of energy transferred per unit area (average power per unit area)
Intensity
The time average rate of energy transferred per unit area. (average per unit area)
Sound intensity
The comparison of the intensity of one sound and the reference sound.
Intensity level
Result of interference of two sound waves of equal amplitude and slightly different frequencies.
Beats
