Chapter 2 Flashcards
phonetics
the study of speech emphasizing the description and classification of speech sounds (phones) according to their production, transmission, and perceptual features.
speech sounds and their disorders are represented by
both form (phone) and function (phoneme) difficulties Speech sounds = phones
Articulatory phonetics
deals with the production features of phones, their categorization, and arrangement according to specific details of their production.
- field of study attempts to document phones according to specific parameters, such as their manner or voicing features.
Acoustic phonetics
deals with the transmission properties of speech
- the frequency, intensity, and duration of phones are described and categorized
auditory phonetics
investigators focus on how we perceive sounds.
speech mechanism
divided into the respiratory, phonatory, resonatory, and articulatory systems.
The respiratory system
consists of: the lungs, rib cage, thorax, abdomen, trachea, and those muscles associated with breathing primary function: vital exchange of gases for life support.
secondary function: generate a stream of air for the production of speech
principle muscle: diaphragm; Several muscles aid inhalation; the more important ones are the external and internal intercostals.
Inspiration
intercostal muscles contract, exert an upward force on ribs
Expiration
intercostal muscles relax, rib cage returns to resting position
pleural linkage
Two pleurae accomplish this pleural linkage, one covering the outer surface of the lungs and one covering the inner surface of the thorax and the top portion of the diaphragm.
Alveolar pressure (during rest)
equal to the outside air pressure
subglottal air pressure
the pressure below the vocal folds, the glottis being the space between the vocal folds
primary function of the larynx and vocal folds
preventing foreign substances from entering the respiratory system
Extrinsic muscles of the larynx
(those having at least one attachment to structures outside the larynx) are primarily responsible for support and fixation of the larynx
Intrinsic muscles of the larynx
(those having both attachments within the larynx) are necessary for control during voice production
adduct
close the vocal folds
abductor
open the vocal folds
fundamental frequency
The average number of glottal openings per second
- females is approximately 200 to 260 cycles per second
- males it is between 120 and 145 cycles per second
primarily responsible for variations in fundamental frequency
Changes in the tension of the vocal folds
changes in vocal loudness result from
variations in subglottal air pressure, which varies the amplitude of the vocal folds’ vibratory cycle
We perceive this as an increase in loudness.
When more subglottal air pressure is present, the vocal folds move farther away from the midline during their vibratory cycles
timbre
the tonal quality that differentiates two sounds of the same pitch, loudness, and duration
The resonatory system
composed of three cavities within the vocal tract: the pharyngeal, oral, and nasal cavities
Vocal tract
consists of all speech-related systems above the vocal folds