Clinical AEP software module The EP25 module measures and analyses the full range of auditory evoked potentials within a 980ms response window. It has the ability to synchronize with external devices (e.g. cochlear implants) and is ideal for clinics that encounter a wide range of AEP-related pathologies.
EP25 contains all the functionality of the EP15, but has additional built in tests for middle and late latency potentials (AMLR, ALR, MMN, P300) as well as ECochG and EABR.
Emphasis in the EP25 is on flexibility. Users can design their own tests and exercise complete control over all parameters.
User and Pre-Programmed protocols
Middle and Late latency Tests (MLR, LLR, MMN, P300)
ECochG markers and Rate Study
New patent pending stimuli CE-Chirp® and NB CE Chirp®
Latency Intensity Function
Quality Target Line (Fmp) and Residual Noise calculation
Results you can trust
„Threshold testing was always a difficult task“
“Now with the new CE-Chirp®, we experienced markedly reduced test times and clearly interpretable waveforms around threshold, compared to traditional Click”
Klin. Doz. Dr. Dorothe Veraguth Head of Audiology Department University Hospital in Zürich
Two channels (standard) EPA4 Cable Collector (4 electrodes). Standard 50 cm. Option: 5 cm or 290 cm
One Channel (optional) EPA3 Cable Collector (3 electrodes). 50 cm
Gain: 80 dB/60 dB
Frequency response: 0,5 - 5000 Hz
Noise: 4nV/√Hz - 0.22 μV RMS (0 - 3 kHz)
0.22 μV RMS (0 – 3 kHz)
CMR Ratio: Minimum > 118 dB. Typical 130 dB <100 Hz
Radio Frequency Immunity: Typically 25 dB improvement over previous available designs
Max input offset voltage: 2,5 V
Input impedance: 10 MΩ
Power: From main unit
30Hz rectangle. Impedance information for each individual electrode.
No unplugging of electrode leads required. Readout directly on Amplifier.
Measuring Current: 25uA. Ranges: 0.5kΩ -25kΩ.
Frequency specific stimuli
Tone burst: Frequencies: .5kHz to 4kHz.
Envelopes: Blackman, Gaussian, Hanning, Hamming, Bartlett, Rectangle, and manual
NB CE-Chirps®: 500Hz, 1kHz, 2kHz and 4kHz. Bandwidth +/- ½ octave
Broad Band Stimuli
CE-Chirp® with cochlear delay compensation.
Rate: 0.1 – 80.1 per sec.
20 – 135d,5 peSPL in 1dB steps (-10 – 100dB nHL in 1 dB steps)
White noise. 0 - -40dB relative to stimulus.
Response Confi dence Targets of 95%, 97,5% or 99%.
Fmp calculation based on 5 points with selectable range.
On-line during measurement. Selectable stop criteria. 5 points calculation with
Number of channels
2 channels. (EPA3: 1 channel).
Number of curves per
Several automatic test protocols included. As many automatic tests as desired may be
designed and added by operator. Manual control during automatic testing is available.
Analysis time: 0-980ms window. Acquisition start: +/- 2ms from stimulus onset.
A/D resolution: 16bit. Points per trace: 450 displayed.
Automatic: Before each new intensity is tested, the best suitable gain is automatically selected. Manual: 6dB steps from 74dB to 104dB (10μV to 320μV input).
Displayed online. Refresh rate: 10Hz typical.
Digital filtering for Low Pass and High Pass. Low Pass FIR filters without time shift of
wave peak. High Pass fi lters analog Butterworth 0.5 to 100Hz 6/12dB octav. On the
EP15/EP25 or from any reader station in a network it is possible to apply different visual
filtering during testing as well as after the test is completed.
The EP25 may be controlled or may itself control stimulators for cochlear implants.
EABR (FDA approved).
On-line Help for buttons, entry ﬁelds etc., as well as an electronic operation manual
with search functions and cross references are included.
ECochG recordings with markers. Middle Latency. Late Latency (P300, MMN etc.).
VEMP (optional). Cochlear implant stimulator control.
EP15 / EP25 Software CD
ETB Standard electrode cable with buttons
ETU Universal electrode cable
ETR Electrode cable with re-usable electrodes
ETS Electrode cable spring
PEG15 Set of 25 single use pre-gelled electrodes
ETT Tip trode electrode cable set (only EP25)
TTE25 Tip trode gold electrodes 10 pcs. for ECochG (EP25 only)
20 pcs. of Infant eartip (2 x 10)
EarTone ABR Insert ear phones w/foam tips
SPG15 Tube of skin preparation gel
Ten20™ Electrode gel
LBK15 Loop Back unit for system performance check
Alcohol pads (100 pcs.)
B71 Bone conductor
EPA3 Cable collector (one channel/3 electrodes)
License for VEMP functions
Ear-Tone ABR insert phones included.
Independent calibration for TDH39 (Optional).
Independent calibration for B71 (Optional).