Lesson 13, Speech Discrimination Tests
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The addition of ____ dB to a SDT score estimates ___.
8-10 dB, SRT
SRT verifies what?
SRT verifies your PTA (usually within 5 db)
What is Speech Discrimination test?
It uses single syllable word lists, chosen so they approximate a sample of speech sounds occurring in an ordinary conversation.
What is Timbre?
Tonal quality of a complex sound.
We recognize different vowel sounds because of variations in timbre
What is fundamental Frequency?
The frequency that predominates.
In a complex tone, the lowest frequency, being the loudest, predominates.
The weaker higher frequency
Overtones in exact multiples of the fundamental frequency.
Is a speech sound
It composed of several frequencies of varying intensities.
Is a range of frequencies in the spectrum of a sound where certain harmonics are relatively loud.
They give complex sounds their distinctive characteristics
Ex: tell a violin from a flute, one vowel from another
What is the most important energy for recognizing speech sounds are the ____ and ____ formants.
second and third
Third Formant frequency range
1500 to 4500Hz
Second Formant frequency range
700 Hz to 3500Hz
First Formant frequency range
200 Hz to 1200Hz
Most of the energy in ____frequencies of background noise masks out the _____frequencies components.
The ____frequencies in speech are always more important for providing intelligibility than ____ frequencies
Results when a louder sound occurs immediately after a softer sound, causing the softer sound to be inaudible, even though it occurred first.
Occurs when one sound follows another closely in time and the first sound reduces the sensitivity of recently stimulated cells.
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