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Table 3 Test protocol for recording auditory brainstem responses and late latency responses

From: Effect of early onset otitis media on brainstem and cortical auditory processing

Parameter

Auditory brainstem responses

Late latency responses

Stimuli

Clicks

Clicks

Stimulus intensity

70 dBnHL

70 dBnHL

Transducer

TDH 39P headphones

TDH 39P headphones

Repetition rate

11.1/s

1.1/s

Stimulus polarity

Rarefaction

Rarefaction

Number of sweeps

1500

500

Filter setting

30–3000 Hz

1–30 Hz

Analysis window

-10 ms to +25 ms

-50 ms to +350 ms

Electrode montage

Vertical montage

Positive – Cz

Negative – M1, M2

Ground – Nasion

Vertical montage

Positive – Cz,

Negative – M1/M2

Ground – Nasion

Electrode impedance

< 5 kOhms

< 5 kOhms