1. hammer/cow bell noisemaker, 0 - 6 mo.
2. crib-o-gram, 90 dB loud noise, sensor under crib mattress for movement (non-functional: unilateral, heavy sleeper)
3. ABR Auditory Brainstem Response (EEG) noise with earphones
4. Otoacoustic Emissions: Otoacoustic emissions (OAEs) are sounds given off by the inner ear when the cochlea is stimulated by a sound. When sound stimulates the cochlea, the outer hair cells vibrate. The vibration produces a nearly inaudible sound that echoes back into the middle ear. The sound can be measured with a small probe inserted into the ear canal.Those with hearing loss greater than 25-30 decibels (dB) do not produce these very soft sounds. The OAE test is often part of a newborn hearing screening program. This test can detect blockage in the outer ear canal, as well as the presence of middle ear fluid and damage to the outer hair cells in the cochlea.
5. Observation Audiometry: baby looks at a toy. A noise in BACK is made. See if baby notices.