Vertigo is a hallucination of movement,arising from problems within the vestibular portion of the inner ear.
The world spins about the patient, or the patient feels there is moving in space.
Dizziness is a giddy or swimming sensation ,and is not vertigo.
Any disorder, tumor, infection or trauma causing a unilateral decrease in vestibular function may cause vertigo.
Friday, December 30, 2011
Hearing loss, is it a volume problem?
Anyone who is not familiar with hearing loss assumes that it is like turning the volume on a radio lower and lower until,you have difficulty understanding the words, or cannot hear at all.
Hearing loss is far more subtle than that.
A person with hearing loss usually has a different amount of loss at each frequency across a range of hearing. For example, a person may have normal hearing in the lower frequencies, a moderate hearing loss in the middle frequencies and a severe loss in the high frequencies.
In relation to hearing aids,and in order to understand speech better, the person wants the low frequencies unchanged,the middle frequencies a little louder, and the high frequencies very loud.
Increasing the volume of the radio makes all the frequencies louder. The volume is so loud in the lower frequencies,where the hearing is normal, that it becomes intolerable. Louder does not mean clearer in relation to frequencies unless the frequencies are properly balanced.
Hearing loss is far more subtle than that.
A person with hearing loss usually has a different amount of loss at each frequency across a range of hearing. For example, a person may have normal hearing in the lower frequencies, a moderate hearing loss in the middle frequencies and a severe loss in the high frequencies.
In relation to hearing aids,and in order to understand speech better, the person wants the low frequencies unchanged,the middle frequencies a little louder, and the high frequencies very loud.
Increasing the volume of the radio makes all the frequencies louder. The volume is so loud in the lower frequencies,where the hearing is normal, that it becomes intolerable. Louder does not mean clearer in relation to frequencies unless the frequencies are properly balanced.
Saturday, December 10, 2011
Rock & Pop Musicians And noise.
Rock and pop musicians are at risk of having noise induced hearing loss the same way industrial workers do. Loss of hearing may be considered an occupational injury among musicians. A Spanish study among 60 young musicians and 60 youngsters in the control group with an average age of 26 years found a connection between being a musician and suffering from noise induced hearing loss.
More symptoms of NIHL were found among the musicians. At 4,000 Hz frequency, or high pitched sounds, the audiometer showed significant differences between musicians and non-musicians. Although young musicians did not suffer from hearing loss at the time of the study, almost 7 percent already suffered from permanent tinnitus, and 17 percent had experienced temporary ringing sounds in their ears.
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