DP Otoacoustic Emissions

Lee VanMiddlesworth lvm1 at erols.com
Sat Mar 8 09:34:29 EST 1997


Just a thought.

In spite of the hard sell that has been made in this field for DPOAES,
it's important to consider that the jury is still out on the "perfect"
technique.There is still a great deal of mis-information being spread on
both techniques (Note appropiate comment by M. Gorga on this newsgroup).
Transient OAEs and Distortion Product OAEs are different approaches to
measure a "similar" event in the same region of the cochlea. Strong
advantages & disadvantages exist for each approach, with a tremendous
amount on research " still" being done on TEOAEs, ie: contralateral
suppresion, newborn screening. The vast majority of OAE testing around
the World and US is still done with TEOAEs, with DPOAEs gaining
increasing use. It may be a little premature to cast in concrete the
direction of this area of testing. Most clinical and research facilities
in the US have systems capable of doing both types of measurement. OAEs
have become an important and increasing common tool in audiometric
assessment - I would suggest that you carefully dodge all the marketing
hype, investigate all the systems, and base your choice on capability &
flexibility, both current and future.

Additionally, you may want to get a copy of the new OAE book by 
Robinette and Glattke (Thieme). It's an excellent reference, and covers
techniques as well as specific equipment.

Lee VanMiddlesworth
Otodynamics USA



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