D-0103906-D – 2019/03 Page 5 of 5
2. Use Insert Headphones
The recording below was carried out using reusable electrodes and headphones. Note the very large spikes
before 1ms, especially on the curves at high intensities.
This is an electrical artifact caused by electrical coupling from the headphones to the input circuit when high
sound stimuli intensities are used.
To solve this:
- Always use insert earphones
- If using head phones they must be shielded. A shielded headset will still produce a small artefact
using intensities above 90 dB SPL
-
Start the recording window after the artifact
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