Hearing and noise Flashcards
1
Q
Decibels measure
A
Logarythmic - doubling sound intensity causes 3db increase
2
Q
Hearing pain and damage
A
Pain up to 130db. Instantaneous damage at 140 db
3
Q
Temporary hearing loss
A
Unprotected exposure to moderate noise (90-100db) for lesser time can lead to temporary loss of hearing ability.
4
Q
Noise induced hearing loss
A
Sudden loud noise and or prolonged exposure to relatively low levels of noise (70-80db) can lead to permanent hearing loss
5
Q
Normal speach range
A
500-3000 hz range
