help ,,,plz ans this Q - usmlee2010

[ArchivalUser]

elder people have prob in listening

low frequency sound
high frequency sound
have conduction deafness prob
have nerve conduction prob


i did Fred test at thier center there was of course no ans sheet in last like in offline fred
so plz tell me ans for this ,,,might be i will see this one in real exam.

[ArchivalUser]

Presbycusis refers to a loss of hearing that is the result of the natural aging process. The condition involves degeneration of the inner ear (cochlea) over time. Presbycusis can also involve other parts of the auditory system. This is progressive in nature, with loss of hearing for the high pitch sounds affected first. For example, high pitched sounds for speech are /s/, /f/, /th/, and /k/—the unvoiced consonants. The process begins after age 20. However, it is typically at ages 55 to 65 that the high frequencies in the speech range begin to be affected. The speech range of pitches (frequencies) is from 250Hertz (Hz) through 8,000 Hz.


so..high frequency...