Deafness practically illustrated / [James Yearsley].

  • James Yearsley
Date:
[1849]
Catalogue details

Licence: Public Domain Mark

Credit: Deafness practically illustrated / [James Yearsley]. Source: Wellcome Collection.

    183/200 page 171
    rousing, as he fancied, the torpid auditory nerve by loud noises, continued day after day for a certain time. He was not successful in the experiment, and it is not a practice which I should advise; on the contrary, I think deaf persons should carefully avoid all excessive or long continued noises. They may, it is true, excite the nerve of hearing for the time, but afterwards, ac- cording to my experience, it sinks into a deeper state of insensibility. Late hours are very prejudicial to the hearing. Many deaf persons receive a serious injury, which is not overcome for several days, from the exhaustion of the nervous system consequent on late hours. Those habitually accustomed to occupation during the night lose their hearing from the advance of age much earlier than other persons. I have elsewhere mentioned the fact of the extreme prevalence of impaired hearing among the members of the houses of parliament, attri- butable, no doubt, in some measure, to the late hours to which their sittings are prolonged during so many months of the year. Some of the points here treated of may appear minute and not deserving of the attention I have be- stowed upon them, but it must be remembered that I have had chiefly in view that class of persons who are shut out from the ordinary means of assistance, and to whom every possible mode of conservating the remain- ing powers of the sense is invaluable. I now pass to a consideration of the value of the various acoustic aids which have been proposed for the use of deaf persons. 72
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