Hearing impairment commonly begins between ages 30 and 44

Evidence

These data do not paint an attractive picture for multichannel audio for those among us with deteriorated hearing. The good news is that other tests done by these authors indicate an improvement in speech clarity when the person speaking is facing the camera. Consciously or subconsciously, we all read lips. It is interesting to note that in their population of 41 subjects, with ages ranging beyond 75, those exhibiting hearing impairment began showing up in the 30–44 age group, with progressive deterioration at more advanced ages. The message here is that this is a factor to be considered in the creation of programs. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1913

Categorization

• XREF: The onset at 30-44 fits presbycusis literature showing measurable high-frequency threshold shifts beginning in the third decade; couples with the reader’s audiometry knowledge. — connects to: Hearing loss that harms multichannel dialogue clarity can begin as early as age 30. — , Toole, Floyd E - Sound reproduction-…, 1440; Age-related hearing loss directly causes increased preferred treble; Binaural temporal fine structure sensitivity declines by middle age independently of hearing thresholds — Dijk, Pim van, Physiology, Psychoacoustics and…, 1078
• QUESTION: Worth chasing: how much of the early onset is occupational/recreational noise exposure versus age-related inner-ear changes, and does the same cohort show it in standard audiograms or only in this speech task?
• corroborated: 2 independent passages support this claim — Toole, Floyd E, Sound reproduction- the acoustics and…, 1913

Broader Connections

• Hearing loss that harms multichannel dialogue clarity can begin as early as age 30. #corroborates (0.85) — , Toole, Floyd E - Sound reproduction-…, 1440
• Binaural temporal fine structure sensitivity declines by middle age independently of hearing thresholds #expands (0.80) — Dijk, Pim van, Physiology, Psychoacoustics and…, 1078
• Age-related hearing loss directly causes increased preferred treble #expands (0.75)