Low-frequency exposure makes quadratic distortion products oscillate for minutes

Evidence

In 14 out of 20 tested subjects, the LF exposure induced a subsequent increase of the QDP level lasting for about 60 to 90 s (see Fig. 1a ). QDP levels increased with a median of 3.4 dB. In most cases, this QDP increase was followed by a similar QDP decrease (median: ‑2.4 dB), at about 120–150 s post-exposure. This decrease slowly recovered to pre-exposure QDP levels. The median duration of the overall oscillatory change of the QDP level was 214 s. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3711

Categorization

• corroborated: 4 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 3711
• XREF: connects to: Variable-frequency experiments reveal frequency effects that fixed-frequency masking hides.; Low-frequency noise fluctuates audibly while high-frequency noise is steady

Broader Connections

• Variable-frequency experiments reveal frequency effects that fixed-frequency masking hides. #expands (0.75)
• Low-frequency noise fluctuates audibly while high-frequency noise is steady #expands (0.70)