This statement I don't think I agree with. If a person has "tinnitus ears" because of acoustic trauma, then acoustic trauma was the cause. In that case, the person is also prone to so-called accelerated ageing of the cochlea (even in a best-case scenario i.e. in a scenario that does not include repeat exposure). By simple logical implication, a person who experiences a repeat noise trauma is therefore even more susceptible to further damage than in the best-case scenario.
There is quite a bit of literature on this specific topic by
Prof. Kujawa which includes animal models where the noise exposure only resulted in temporary threshold shifts and yet, when long-term follow-up assessments were done, evidence showed accelerated ageing in these "benign" exposures. Prof. Kujawa is a prolific author on this topic as can be seen here (just a small sample):
Some of her publications go back a decade, and so, it shouldn't really be news to anyone (I mean it's not like they discovered these results last week).
From the paper published in 2015:
View attachment 16297
To understand synaptopathy in humans, this by itself would not lead to a measurable hearing loss via a pure-tone audiogram. So it cannot be observed, but that doesn't mean it isn't there. And indeed synaptopathy is the earliest stage of hearing loss which can manifest itself as hidden hearing loss (detectable by speech-in-noise testing).
From
Prof. Kujawa's profile:
"An area of current focus in Dr. Kujawa's laboratory is the aging of noise-exposed ears.
She has discovered an insidious process that begins acutely after noise, as a loss of communications (synapses) between sensory inner hair cells and cochlear neurons. Loss of the neurons themselves follows slowly, but ultimately reaches the same magnitude. These effects of noise immediately and permanently change the way the ear processes sound information, and they occur even when the exposure produces only temporary changes in hearing thresholds; i.e., for exposures previously thought to be 'safe'.
Moreover, she has shown that such exposures dramatically accelerate the gradual loss of cochlear synapses and cochlear neurons otherwise seen with aging alone. This work has provided the first clear evidence that noise exposure continues to have damaging effects on the ear and hearing long after the noise has stopped."