Speech Processing Flashcards
List the ABs sound processing strategies.
CI CIS MPS SAS CII and 90K HiRes Fidelity 120 Clear Voice HiRes Optima
Why can we call ourselves Industry-Leading Innovators in Sound Processing?
HiRes Optima/Fideltiy 120
ClearVoice
Binaural VoiceStream Technology
AutoSound
Which sound processing strategies are “Paired Stimulation”?
HiRes-P
HiRes-P with Fidelity 120
HiRes-P Optima
MPS
Which sound processing strategy is “Sequential Stimulation”?
HiRes-S
HiRes-S with High Fidelity 120
HiRes-S Optima
CIS
What are the parameters of sound?
Temporal (Time)
Spectral (Frequency)
Intensity (Amplitude)
What is AutoSound
“Set it and Forget it.”
IDR and AGC working together
Makes adjustments to soft sounds to be audible and loud sounds to be comfortable.
What is HiResolution?
It preserves the clarity of sound need for hearing in noise and music. It does so by preserving the fine structures of sound. We can do this because of our ability for fast stimulation rates.
What is ClearVoice?
Breakthrough sound processing that improves speech understanding in noise while maintaining the same performance in quiet.
What makes AB unique and what we consider the World’s Best Hearing Performance or the AB Advantage?
TMic
AutoSound
HiResolution sound processing
ClearVoice
How does HiRes Fidelity 120 work?
Current Steering
How does current steering work?
Multiple current sources. Designed to deliver added spectral info between adjacent pairs of electrodes through accurately weighted simultaneous stimulation.
What are the benefits of ClearVoice?
Provides improved speech understanding in noise
Enhances lyrics for music
Provides the same great performance in quiet
Allows for listening in dynamic environments without the need for a program or processor adjustment.
What is AB’s goal for sound processing?
To faithfully represent the characteristic of the incoming acoustic signal to the listener.
Describe the difference between sampling rate and stimulation rate?
Sampling rate is the front-end design that ensures accurate capture of the acoustic environment. The stimulation rate is the detailed delivery of information to the nerve.
Real-world sounds includes….
Envelope information (overal amplitude) and fine structure information (frequency and phase). these parameters are constantly changing
Why is temporal information important?
Provides envelope information, periodicity information and fine structure information.
What does envelope information perceptually correlate to?
Prosody and intonation
What does periodicity information perceptually correlate to?
Segmental (manner, voicing, vowel, intonation and stress
What does fine structue information percepttually correlate to?
segmental (manner, voicing and place of artic), fast changes in amplitude mark consonants from non-consonants
How does AB help each patient achieve his/her maximum potential?
By working to take away the limitations of technology.
What acoustic characteristics of sound relate to speech and music
The envelope of sound for speech and the fine structure of sound for music.
Which is a faster stimulation mode? Paired or Sequential
Paired
How does HiResolution processing preserve envelope and fine timing cues?
5,200 Hz sampling and 83,000pps stimulation rate
Intensity is influenced by how sound is captured AND how sound is processed by the implant system. What two features provided by AB helps us hear?
TMicand AGC
How does AGCII work? What is a technical name for AGC II?
Computes simultaneous short term and long term (or a fast loop and slow sloop) estimates of the incoming sound. This allows for the application of more gain to softer sounds (slow loop) to maintain audibility and compression to maintain comfort for louder sounds (fast loop).
Cambridge Dual-Loop AGC
How does IDR function?
it determines how muchof the sound captured by the processopr is mapped into the recipients electrical dynamic range (EDR).
What is EDR?
Electrical Dynamic Range-the range between the programmed thresholds and comfort levels (T’s and M’s)
Range is between 20 to 80 dB
What is the IDR for normal hearing?
100 dB
Spectral resolution for speech is ______, whereas the resolution for music is ________.
Ellipses
Points
List features/functions of Fidelilty 120
Works because we have multiple independent current sources.
adds increased spectral information
Aids with hearing in the real world of sound: hearing in noise, music, environmental sounds, tonal languages
Beyond physical electrode contacts
Targeted stimulation at mulitiple locations between each physical electrode contact
Why was HiRes Optima created?
Better battery life
New compliance voltage (4 V)
How does current steering change with HiRes Optima?
Stimulation is delievered only between the physical electrodes
Got rid of 100% stimulation on one or two electrodes.
How does ClearVoice work?
It is a pre-processing strategy. It identifies channels in which unwanted sound is present and attenuates transmission in those channels to enhance the SNR
There is a scene analyzer working associated
What two types of noise are there?
Steady state (stationary) and time-varying (modulated)
What is the attenuation for each ClearVoice setting?
Low-6 dB
Medium-12 dB
High- 18 dB
Why should recipients try ClearVoice?
Significantly improves speech understanding in steady-state noise and multi-talker babble
Same great performance in quiet
Determined to be preferred by most subjects for everyday listening (93%)
Almost all subjects benefitted from ClearVoice (98%)
All subjects would like and would use ClearVoice!
What was the average battery life improvement with Optima?
53%
Range of 25% to 109%
