Chapter 7 Production and Perception of Sound Waves Flashcards
Zemlin’s Definition of Vowel?
A vocal sound produced by relatively free passage of airstream through the larynx and oral cavity.
What does the raw phonatory signal sound like?
Sounds like a bilabial voice trill - otherwise known as a raspberry or Bronx Cheer.
True or False: Vowels are always produced with VF vibration
True
How is Consonant Speech Sounds Produced?
One or more areas of partial or complete vocal narrowing caused by some degree of constriction.
Nearly periodic complex waves are…
A wave that is almost periodic, as a result of vocal vibration
True of False: All vowels and some consonants are produced through nearly periodic complex waves
True
True of False: Continuous aperiodic waves happens when airflow moving through the glottis constriction in the vocal tract stops turbulence
False: airflow moving through the SUPRAglottis constriction in the vocal tract CREATES turbulence (noise)
What type of periodic wave happens when noise and rapid pressure changes in vocal tract, which creates pressure variations in the mouth?
Transient Aperiodic Waves
What does it mean by Transient?
Short-lived; Transient aperiodic waves mean that they are brief, non-repeating sounds
What are two examples of speech sounds that come from continuous aperiodic waves?
/s/ and /f/
What are two examples of speech sounds that come from transient aperiodic waves?
/p/ and /k/
What are the two fundamental characteristics of speech sound production?
Source: sound source or input to the vocal tract (VF vibrate to produce periodic sound waves)
Filter: Vocal tract as the resonator/modulator of the sound (it’s what creates the specific sounds needed to come out of the vocal tract)
The vocal tract is a _____-dependent source
Frequency dependent, where the tract resonantes, only allowing specific frequencies to pass through the filter with greater amplitude than other frequences
Formula of the acoustic theory of speech production
P(f) = U(f) * T(f) * R(f)
What does it mean by vocal sound source?
It is the initial sound produced before modifying
