exam 1 Flashcards
what are some problems that people face when they have sensorineural hearing loss?
- decreased audibility
- decreased dynamic range
- decreased frequency resolution
- decreased temporal resolution
auditory processing disorders
disorders of the brainstem, mid-brain, or auditory cortex that can exist independently of any peripheral HL or can be the direct consequence of an impaired cochlea sending deficient signals to the brainstem
spatial processing disorder
a deficit that occurs even when sounds are made comfortably audible by individually prescribed amplification
- does fall under auditory processing disorder (is a type)
- hearing impaired have and EXTREMELY hard time separating the sound from noise/masker
frequency
- cycles per second
- Hz
period
1/frequency
-seconds or milliseconds
phase
timing of a sound, or 1 component of a sound, relative to some other aspect of the sound/or relative to another sound.
-360 degrees
wavelength
distance a sound wave travels during 1 period
diffraction
the way the sound is altered by an object
pressure
force per unit area
-pascals
sound pressure level
number of dB by which any sound pressure exceeds the arbitrary, but universally agreed reference sound pressure of 2x10 (^-5)
RMS
root mean square:
represents the strength of a fluctuating signal over a certain time.
waveform
how the pressure of a sound wave varies from moment to moment in time.
spectrum
added mixture of puretones that produce a complex sound over a portion of time
fourier transform
enables the spectrum to be calculated if the waveform is known
impedance
how easily a medium vibrates when a sound pressure is applied to it.
linear amplifier
everything gets bigger by multiplying the input signal by a fixed amount