Speech Production and testing Flashcards
What is quick SIN?
A diagnostic ‘speech in noise’ test which tests the signal to noise ration loss
Ie how much do we need to boost signal so patient can hear over noise
What is the quick SIN methodology?
6 sentences containing 5 key words
Presented at prerecorded SNR ratio
Decrease 5dB with each sentence
Normal to severely impaired performance in BGN
Defaults to 70dB but can be changed dependent on HL
What are the quick SIN presentation levels?
identify PTA average:
Up to 45dB = 70dB
55. 80-85
65. 90-95
75. 100-105
Ie 25-30 above their PTA average
What are the SNR results for quick SIN?
0-3. Normal hearing
4-7. Mild SNR loss mild issue in BGN
8-15 moderate SNR loss
15+ severe SNR loss
The greater the loss the better HA technology required
Record results on diagnostic page in CMS
What are the types of speech issues that we can test using speech testing? (5)
Retro cochlea
Auditory ability - disparity between ears
Non organic hearing ie noise induced
Child testing
Hearing aid benefit
Name the different speech tests for adults?
Speech recognition threshold test
Speech discrimination tests
Arthur Boothroyd
Acceptable noise level
Audibility index audiology
Speech shaped noise
HH consultation - speech test
What is the speech recognition threshold test?
Spondee words 2 equal words together ie eardrum airplane schoolboy etc
Word presented patient repeats
If correct increase by 10dB with another word
If wrong decrease by 5dB until heard
Need 3 out of 6 for each ear
Should be within 10dB of PTA average
Describe the speech discrimination test.
Phonetically balanced words used: equally difficult, common use and monosyllabic.
Called the ‘fry’ list.
Do the results match PTA?
Can identify asymmetrical loss
What is the Arthur Boothroyd test?
Uses 3 letter consonant-vowel-consonant words for adults add older children.
10 words - 1 point given for each letter correct. Maximum 30 points available.
Patient repeats what they think has being said.
Describe the acceptance noise level (ANL) test.
Field free - recorded voice through loudspeakers.
A speech passage (story) and noise
ANL = MCL - BNL
Patient listens to story, volume set at their MCL.
Gradually introduce noise to the story until patient reports maximum Levi they could listen to story and still understand speech (background noise level BNL)
The lower the score the better chance of a good fitting.
Explain the audibility index audiogram.
COUNT THE DOTS!!
A speech intelligibility index we count all the dots BELOW the hearing threshold (each ear) to determine score.
Dots strategically placed within specific points of speech bubble/banana
What is the speech shaped noise test?
White noise used to block cochlea. White noise is same intensity across all frequencies.
With SSN patient will capture some sounds as intensity is WEIGHTED across frequencies to mimic speech sounds.
HH speech test?
Unaided-field free-live voice
List of balanced words
Max 10 words
Patient closes eyes & repeats what they hear
Score out of 10
What is speech?
A process of uttering ARTICULATED sounds.
A complete feedback process in which hearing, perception and information processing in the nervous system and the brain are also involved.
Explain harmonics add timbre
A harmonic is a sound wave that has a frequency that is a multiple (whole number) of a fundamental tone - the lowest frequency of that sound.
2nd harmonic (f2) freq twice that of fundamental
4th harmonic (f4) four times that of fundamental frequency.
Harmonics and overtones to a wave that make possible to distinguish between sounds and instruments - known as timbre