Speech Science Exam 2

What is the clinical importance of the Lombard Effect?

It’s tougher on the voice since you need to be loud

More variability in pitch during speech indicates

healthy voice

Jitter

Variability in each time period of voice measurement

Shimmer

Cycle to cycle variation in intensity

What is the s/z ratio?

Ability to produce s and z in the same amount of time

What are the drawbacks of the s and z ratio and max phonation time tasks?

Learning effect, not reliable, compensation strategies, questionable relation to normal speech

What is the lombard effect?

if your environment is loud you will be loud to match it

What frequency does light in a video stroboscopy need to flash in?

Anything other than patient’s fundamental frequency

Determine if need to be worried about vocal pathology from s/z ratio?

Ratio is 1.4 or above

Pitch

perceptual correlate of frequency

Frequency

Objective intensity of sound, Hz and cycles per second

Intensity

objective measurement of sound

Maximum phonation time

duration of maximally sustained vowel

Electroglottography

One electrode introduces current to larynx then current flows across folds to other side of larynx

What do you need to control for during acoustic & aerodynamic testing?

Loudness— mic to mouth distance

Which sounds carry the most energy?

Vowels

Which sounds carry the information?

Consonants

A 220 Hz sound has a wavelength of

340/220= 1.6 m/s

Loudness

perceptual correlate of intensity