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.
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.
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.