Tinnitus after exposure signals damage even below the 85 dB threshold

Evidence

Hearing loss is insidious and permanent, and by the time it is measurable it is too late. Therefore in order to protect hearing sensitivity and acuity one must be proactive. The first strategy is to avoid exposure to excess noises. Although 85 dB(SPL) is taken as a damage threshold if the noise exposure causes ringing in the ears, especially if the ringing lasts longer than the length of exposure, it may be that damage may be occurring even if the sound level is less than 85 dB(SPL). — David Howard, Jamie Angus, coustics and Psychoacoustics, 684

Categorization

• DEFINE: Introduces the practical risk-parameter of tinnitus/lasting ringing as a damage indicator beyond the numeric 85 dB threshold.
• corroborated: 5 independent passages support this claim — David Howard, Jamie Angus, coustics and Psychoacoustics, 684
• XREF: connects to: Chronic 85 dB daily exposure causes hearing loss, while 130 dB risks acute injury; Reversible threshold shifts after noise exposure mask ongoing neural degeneration; Neural hearing damage occurs without measurable threshold elevation (+7 more)

Broader Connections

• Tinnitus signals damaged inner-ear nerve cells #corroborates (0.90) — Gordon Hempton, John Grossmann, One Square Inch of Silence- One Man’s…, 1695
• Recovered hearing thresholds can mask permanent neural damage #qualifies (0.75) — , Toole, Floyd E - Sound reproduction-…, 1815
• Age-related hearing decline in noise begins while thresholds remain normal #corroborates (0.75) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1140