COMD 5070 Exam 1 UPDATED Actual Questions and CORRECT Answer
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Course
COMD 5070
Institution
COMD 5070
COMD 5070 Exam 1 UPDATED Actual
Questions and CORRECT Answers
communication without sound - CORRECT ANSWER- - gesture
- facial expressions
- sign language
- writing
- art
- getting an idea from one brain to another
SLP/audiology disorders can arise in... - CORRECT ANSWER- - converting thou...
COMD 5070 Exam 1 UPDATED Actual
Questions and CORRECT Answers
communication without sound - CORRECT ANSWER- ✔✔- gesture
- facial expressions
- sign language
- writing
- art
- getting an idea from one brain to another
SLP/audiology disorders can arise in... - CORRECT ANSWER- ✔✔- converting thoughts
words
- selecting sound sequences
- detecting sounds adequately
- perceiving and recognizing speech sounds
- deriving meaning from sound sequences
scientific method - CORRECT ANSWER- ✔✔- empirical: based on data
- deterministic: obeys physical laws
- predictive: if you do this... then that will happen
- parsimonious: use the simplest explanation possible
why use acoustic measures? - CORRECT ANSWER- ✔✔- overcome listener bias:
consistent, reliable measurement
- describe severity of impairment objectively
- track progress over time: demonstrate treatment efficacy
- professional focus on EBP (evidence based practice)
- provide biofeedback to the client
,sound is all about vibration - CORRECT ANSWER- ✔✔- a structure vibrates, if this
structure is surrounded by air, then air constitutes the medium by which the sound will travel
- air molecules are flexibly connected with one another
- when a vibration takes place, air molecules push and pull on each other, transferring energy
and the sound from one point to another
transverse waves - CORRECT ANSWER- ✔✔- particles of the medium move
perpendicularly to the direction the wave is traveling
- pebble in a pond: the wave is traveling, not the water itself
- like a wave in the stadium
longitudinal waves - CORRECT ANSWER- ✔✔- particles move parallel to the path of the
wave
- local change in tension makes shockwave travel along the slinky
frequency - CORRECT ANSWER- ✔✔- how often air molecules vibrate
- measured in Hertz (one per second)
what frequency range can humans hear? - CORRECT ANSWER- ✔✔20-20,000 Hz
period - CORRECT ANSWER- ✔✔- how long each repetition takes
- fewer repetitions: lower frequency
period in seconds (equation) - CORRECT ANSWER- ✔✔1/frequency in Hz
frequency in Hz (equation) - CORRECT ANSWER- ✔✔1/period in seconds
wavelength - CORRECT ANSWER- ✔✔- distance from peak to next peak
- important to understand resonance
wavelength equation - CORRECT ANSWER- ✔✔- speed of sound/frequency
, - speed of sound is constant
amplitude - CORRECT ANSWER- ✔✔- how big the vibrations are
- molecules are pushed/pulled away from equilibrium
- larger force = larger displacement = greater pressure change
- we hear this as loudness
sound pressure is measured in... - CORRECT ANSWER- ✔✔dB
wave phase and difference - CORRECT ANSWER- ✔✔- fractions of the entire cycle
- same frequency and amplitude, but their phase is different
- phase can't typically be perceived but it has an impact on how sounds will add together
constructive interference - CORRECT ANSWER- ✔✔- adds amplitudes of two sine waves
- results in sound that is the sum of the two
destructive interference - CORRECT ANSWER- ✔✔- two waves cancel each other out
- results in silence
harmonic series - CORRECT ANSWER- ✔✔- harmonics are integer multiples of the
fundamental frequency (lowest frequency)
- add them together and the result is a periodic waveform that is predictable
combining waves to get a complex tone - CORRECT ANSWER- ✔✔- two waves with
different characteristics can add and create a combination
- it is a complex tone but still periodic
nearly periodic: the voice - CORRECT ANSWER- ✔✔- harmonics present but there is some
noise too
- not perfectly pure
- larynx doesn't perfectly open and close every time
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