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From Intelligent Hearing Systems,
USA
SmartEP Software
Features
- Easy-to-use Windows® menu interface
for fast setting of parameters and efficient evoked potential
processing.
- True multi-tasking operation allows
changing of system parameters and data analysis during patient
testing.
- EcochG, ABR, SN10, MLR, LLR and
P300/MMN modalities.
- Chained-Stimuli feature for rapid
acquisition of intensity series recordings.
- Automatic default parameters allows
the system to be setup for fast start-up and testing.
- User-defined testing protocols for automated data
collection.
- User-selectable artifact rejection
level.
- Easy data and report retrieval.
- Waveforms can be easily measured and
labelled using a mouse.
- Built-in system calibration module,
self-check and diagnosis.
- Basic system hardware can be utilized
to economically upgrade to SmartOAE, SmartScreener, ASSR,
eABR and IVRA hearing screening and testing systems.
- ASSR and eABR upgradable
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Stimulus
Specifications
- Types: Click, Pure Tone, or User-specified
stimulus data file.
- Frequency: Standard up to 16 kHz; Optional
upto 32 kHz.
- Duration: from 25 up to 500,000 µsec., 25
µsec. Increments.
- Windows: Rectangular, Trapezoidal,
Triangular, Cosine, Extended Cosine, Blackman, and Exact Blackman
- Rate: 0.1 to 100/sec. (and higher with
reduced sampling window), 0.1/sec. Increments.
- Intensity (click): 0-100 dB nHL (0-132dB
SPL).
- White noise masking.
 ASSR
- Quick & Accurate Frequency Specific
Hearing Evaluation
- Can be objectively evaluated using spectral
techniques.
- Continuous Stimulus composed of one or
multiple carrier frequencies.
- Generate complex stimuli for steady state
acquisition, selecting up to four simultaneous carrier and modulation
frequencies.
- Automatic determination of presence of
response for each frequency, providing threshold information.
- Illustrative graphs of the acquired
responses., including time and spectral domain signals. A phase diagram
to indicate strength of each stimulus frequency.
Auditory Steady State Responses are auditory evoked potentials elicited
by the use of repetitive stimuli. The use of these methods allow for
accurate threshold detection and objective audiogram generation.
Steady State responses are ideal for objective frequency specific hearing
evaluation. Unlike transient responses that are analyzed in the time
domain, ASSR are using spectral and statistical analylsis techniques,
reducing the potential for human error. The technique also allows for
multiple frequencies to be evaluated in both ears simultaneously, reducing
test times.
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The system provides a Response / No Response
output evaluation for each frequency and intensity level tested.
Unlike conventional transient responses such as ABR, the steady
state responses do not require tedious interpretaton of time domain
signals. The responses are automatically evaluated by comparing
the response strength to the background EEG noise. |
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SmartEP-ASSR provides illustrative graphs
and tables to simplify analysis of the acquired responses. An easy
to read color-coded phasor diagram is used to illustrate the response
strength for each stimulus frequency. A Phase-Intensity analysis
graph shows the effect of intenisty on the response latency. The
response Audiogram helps determine hearing thresholds automatically. |
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Researchers and advanced users may generate
customised complex stimuli for steady state acquisition, selecting
up eight simultaneous test frequencies can be used for each ear. |
 
Comments and
questions: ci@vsnl.com
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International
URL: http://www.careinternational.com
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