Finals (5) - Auditory Sense Flashcards
it is the science and technology of sound including its production, transmission, and effects
acoustics
what are the acoustical design goals?
1.) transmit desired sounds reliably and pleasantly to the hearer
2.) satisfactory to the human regarding noise
3.) minimizes sound related annoyance and stress
4.) minimizes disruptions of speech
5.) preventing hearing loss
it describe how we perceive sound in relation to their physical properties (pitch, timbre, loudness, noise, and speech comprehension)
psychoacoustics
it refers to any vibration (passage of zones of compression and rarefaction through the air or any other physical medium) that stimulates an auditory sensation.
sound
sound is created by ____ from some source
vibrations
the ____ of a physical sound is associated with the human sensation of ____
frequency, pitch
Sound ____ is associated with the human sensation of ______
intensity, loudness
frequency is express in _____, which is equivalent to cycles per second?
hertz (Hz)
how many Hz does young people hear?
16 Hz to 20 kHz
how many Hz do adults hear?
can rarely hear above 12 kHz
what musical scale has a frequency of 256 Hz?
middle C of a piano keyboard
TRUE OR FALSE
The human ear is sensitive to frequencies between 20 to 20,000 Hz
True
how is sound intensity measured?
decibels (dB)
this is the ratio between reference pressure level (Pr), and the pressure of interest (P).
decibels (dB)
what are the sound intensity levels?
deafining, very loud, loud, moderate, faint, quiet
it is defined as any unwanted, objectionable or unacceptable sound
noise
what Hz is dangerous to the human?
85 dBA
Exposure to excessive sound contributes to the risk of ____?
Noise-Induced Hearing Loss (NIHL)
what are the common sources of noise?
guns, power tools, chain saws, airplanes, farm vehicles, firecrackers,
automobile and motorcycle races, music and many occupational environments
