COMD 5070 Exam 1 Study Guide.
Communication without sound - answer- gesture
- facial expressions
- sign language
- writing
- art
- getting an idea from one brain to another
SLP/audiology disorders can arise in... - answer- converting thoughts words
- selecting sound sequences
- detecting s...
Communication without sound - answer✔- gesture
- facial expressions
- sign language
- writing
- art
- getting an idea from one brain to another
SLP/audiology disorders can arise in... - answer✔- converting thoughts words
- selecting sound sequences
- detecting sounds adequately
- perceiving and recognizing speech sounds
- deriving meaning from sound sequences
scientific method - 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? - 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 - 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 - 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 - answer✔- particles move parallel to the path of the wave
- local change in tension makes shockwave travel along the slinky
frequency - answer✔- how often air molecules vibrate
- measured in Hertz (one per second)
what frequency range can humans hear? - answer✔20-20,000 Hz
period - answer✔- how long each repetition takes
- fewer repetitions: lower frequency
period in seconds (equation) - answer✔1/frequency in Hz
frequency in Hz (equation) - answer✔1/period in seconds
wavelength - answer✔- distance from peak to next peak
- important to understand resonance
wavelength equation - answer✔- speed of sound/frequency
- speed of sound is constant
amplitude - 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
wave phase and difference - 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 - answer✔- adds amplitudes of two sine waves
- results in sound that is the sum of the two
destructive interference - answer✔- two waves cancel each other out
- results in silence
harmonic series - 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 - answer✔- two waves with different characteristics can
add and create a combination
- it is a complex tone but still periodic
nearly periodic: the voice - answer✔- harmonics present but there is some noise too
- not perfectly pure
- larynx doesn't perfectly open and close every time
- results in irregularity in cycle repetitions
- repeating pattern is still visible but it's not perfectly periodic
aperiodic sounds - answer✔- numerous sine waves present
- range from high to low frequency
- no mathematical relationship between them
- adding them gives a non-repeating waveform
- result is noise
wave reflection - answer✔- incident waves comes from sound source
- sound bounce off hard surfaces and echo
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper sirjoel. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €10,31. Je zit daarna nergens aan vast.
