The acoustic reflex threshold is usually 10-20 dB below the discomfort threshold.
2.
Because of this latency, the acoustic reflex cannot protect against sudden intense noises.
3.
The acoustic reflex threshold can be lowered by the simultaneous presentation of a second tone ( facilitator ).
4.
Consequently, the absence of an acoustic reflex, by itself, may not be conclusive in identifying the source of the problem.
5.
When acoustic reflex testing is conducted, the acoustic reflex thresholds ( ART ) cannot be determined when attempting to measure on the affected side.
6.
When acoustic reflex testing is conducted, the acoustic reflex thresholds ( ART ) cannot be determined when attempting to measure on the affected side.
7.
An interesting method that involves direct manipulations on the tympanic membrane rather than relying on the acoustic reflex was proposed as one of the embodiments of a US patent by Ragauskas.
8.
However, when several sudden intense noises are presented at a pace higher than 2 3 seconds of interval, the acoustic reflex is able to play a role against auditory fatigue.
9.
This facilitation effect tends to be greater when the facilitator tone has a frequency lower than the frequency of the elicitor ( i . e . the sound used to trigger the acoustic reflex ).
10.
The acoustic reflex normally occurs only at relatively high intensities; contraction of middle ear muscles for quieter sounds can indicate ear dysfunction ( e . g . tonic tensor tympani syndrome-TTTS ).
