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Module 9. Human factors
A perforated ear drum could occur if
•  you were subjected to intermittent noise above 25 kHz.
•  you blew your nose excessively.
•  you were subjected to continuous noise below 8 kHz.

santro asking:
•  isnt it normal for 20Hz to 20 Khz?? confused. please clearify

Community comments: 3
dimky
Posts: 509
23.02.2016 / 20:55
20Hz to 20 Khz is an audible frequency range for human ear.
santro
Posts: 2
24.02.2016 / 11:19
thanks
Jordi
Posts: 98
16.10.2020 / 12:20
it is normal but the answer says "continuous" which is bad regardless the frequency.
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