BERA/ASSR
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, VEMP and IVRA hearing screening and testing systems.

Stimulus Specifications

• Types: Click, Pure Tone, or User-specified stimulus data file.
• Frequency: Standard up to 8 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.

Now Available on three different plateform ->

• USB LITE
• USB JR
• USB BOX

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. 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.
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.
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.