It has been found that distortion product otoacoustic emissions (DPOAE’s) have provided the most information for detecting mild hearing loss in high frequencies when compared to transient evoked otoacoustic emissions (TEOAE). This is an indication that DPOAE’s can help with detecting an early onset of noise-induced hearing loss. A study measuring audiometric thresholds and DPOAEs among individuals in the military showed that there was a decrease in DPOAEs after noise exposure, but did not show a shift in audiometric threshold. This supports OAEs as predicting early signs of noise damage.
Otoacoustic emissions are clinically important because they are the basis of a simple, non-invasive test for hearing defects in newborn babies and in children who are too young to cooperate in conventional hearing tests. Many western countries now have national programmes for the universal hearing screening of newborn babies. Periodic early childhood hearing screenings program are also utilizing OAE technology. One excellent example has been demonstrated by the Early Childhood Hearing Outreach Initiative at the National Center for Hearing Assessment and Management (NCHAM) at Utah State University, which has helped hundreds of Early Head Start programs across the United States implement OAE screening and follow-up practices in those early childhood educational settings. The primary screening tool is a test for the presence of a click-evoked OAE. Otoacoustic emissions also assist in differential diagnosis of cochlear and higher level hearing losses (e.g., auditory neuropathy).
Spontaneous otoacoustic emissions (SOAE)s are sounds that are emitted from the ear without external stimulation and are measurable with sensitive microphones in the external ear canal. At least one SOAE can be detected in approx. 35-50% of the population. The sounds are frequency-stable between 500 Hz and 4500 Hz to have unstable volumes between -30 dB SPL and +10 dB SPL. The majority of the people are unaware of their SOAEs; portions of 1-9% however perceive a SOAE as an annoying tinnitus.
David Hayutin, DDS is your Pediatric Dentist with a gentle and caring touch. Kids may be a little ill at ease when they come to the dentist, but Dr. Hayutin’s specialty is working with youngsters and helping them achieve optimal dental health. He has been serving patients in the Denver, Colorado area since 1989. We’re highly experienced not only in children’s dental health, but also in keeping your little one calm and comfortable during their visit. In addition, we provide hospital dentistry and work with handicapped children. Our dental practice offers your young ones the best combination of experience and caring you’ll find in the Denver and Aurora, CO area.
There is a lot to like about The Nourishing Traditions Book of Baby and Child Care by Sally Fallon Morrell and Thomas S Cowan. Some of it is exceptionally well-researched (other things I thought were a little sketchy or questionable, see further below). I could never list all the awesome things the book discusses, but some of the highlights for me include:
An otoacoustic emission (OAE) is a sound which is generated from within the inner ear. Having been predicted by Thomas Gold in 1948, its existence was first demonstrated experimentally by David Kemp in 1978 and otoacoustic emissions have since been shown to arise through a number of different cellular and mechanical causes within the inner ear. Studies have shown that OAEs disappear after the inner ear has been damaged, so OAEs are often used in the laboratory and the clinic as a measure of inner ear health.
In high school I was involved with sports (softball, basketball, track) was FFA vice president, and a member of the National Honor Society. After high school I received an athletic scholarship to play softball. While in college I started a physical education program at a local Lutheran Church School. The people and the children became family to me and I was offered a part time teaching assistant job working with the kindergarten class. During the summers of college I spent my time coaching softball to young girls. Over my four years of coaching we won four state titles, four regional titles, three Nationals appearances as well as an invitation to the Babe Ruth Little League World Series.