affecting Hearing and Acoustic pollution:
sensitivity profile or auditory range (the range of frequencies
and the minimum intensity (loudness) of each frequency that the
animal can normally detect in the absence of any damage or pathology).
Form of noise pollution for which there will be no physical evidence
of damage. Masking is when the environmental noise level is intense
enough and of the right frequency range to cover-up pr “mask”
the normal hearing range of the animal. In this case, an animal
in the environment will be functionally unable to hear what it
may need to hear because of the masking noise- but the animal
will not be deaf.
Is the loss of normal acoustic sensitivity due to damage or some
pathologic process. Some damage will be detectable grossly (head
trauma, haemorrhage, parasites) mostly however, inner ear damage
will be detected only histologically on specimens that were well
prepared for the microscope. For live animals, loss of hearing
sensitivity will only be detected by functional testing and neurologic
Other inner ear function- Affected by vibration (sound wave) injury.
For example vestibular function (balance) may also be damaged
by high intensity, low frequency (explosions).
C-TURTLE List server:
Lawrence Herbst DVM MS PhD dipACLAM
Albert Einstein College of Medicine
Institute for Animal Studies, Albert Einstein Coll
1300 Morris Park Avenue
Bronx, NY 10461 US
S., Musick, J., Lenhardt, L. (1999) Auditory evoked potentials of
the loggerhead sea turtle (Caretta caretta) Copeia (3) p.p. 836-840.