Sensitive Hearing: Diminishing Tolerance to Sound

People have some tolerance limit to sound. At certain intensities, sound becomes intolerable for many. But there are people who suffer from sensitive hearing, and they are unable to withstand even ordinary noise. This hypersensitive hearing disorder occurs with or without hearing loss.

Sensitive hearing arises due to hyperacusis, phonophobia, and misophonia. Hyperacusis is a condition that arises from a shift in the processing of sound. Even average sound levels can trigger abnormal reaction as though excruciating noise is heard. In misophonia, only specific types of noise are disliked. People with misophonia detest some noises, which do not at all cause any reaction to the rest. Extreme aversion to noise is called phonophobia or fear of sound, which occurs in people who believe that any noise will cause damage to their hearing.

Abnormal hearing sensitivity may be selective, in which the affected patients may dislike only certain types, but not all, noises. For instance, clattering of kitchen utensils, scratching of boards or surfaces, creaking of doors, and blowing of car horns can irritate these people. However, they may be able to listen to other sounds, like music, even at higher volumes. A significant number of people with poor sound tolerance have hyperacusis, phonophobia, and misophonia. Hearing sensitivity may not be a product of damage to the inner ears. In many cases, failure of the brain to process sound properly leads to errors in sound perception.

Let us explain the mechanism behind sensitive hearing. As we know, the auditory nerve consists of thirty thousand fibers, which carry information to the brain. No hearing occurs until the impulses reach the conscious part of the brain. The brain does a complex task at such a very short span of time of processing the incoming impulses, filtering unwanted sound and amplifying perception of relevant sound impulses.

In the case of hypersensitive hearing, the brain reacts abnormally to what other people would regard as regular noises. The perceived excruciating noise gives rise to negative emotional reactions. People with hyperacusis or misophonia tend to avoid noises. Then they develop fear of sound or phonophobia. Soon this affects their daily life. They cannot have normal conversations with people. They cannot perform their duties normally. Even small noises can irritate them. Going to public places can become a dreadful thing.

Abnormal hearing sensitivity is caused by several factors. Frequent use of ototoxic medications can cause damage to the tiny delicate structures in the inner ears. Some antibiotics and antihistamines can cause damage to the inner ear in the long run. NSAIDs can cause such damage too. This damage leads to different hearing problems like tinnitus, hearing loss, and hyperacusis. Experts also think that stress is a huge factor in the collapse of hearing tolerance. This is probably because stress stimulates the release of certain chemicals in the body, which affect the ears and the brain. Physical injuries can also lead to damage to the auditory system. For instance, a person who suffered a whiplash may develop abnormal hearing sensitivity. People with malfunctioning brainstems may also have abnormal tolerance to noise and certain sounds. There could be other causes of sensitive hearing, but audiologists cannot possibly identify all causes.

There are different ways to treat hypersensitive hearing, but none of these methods are thought to be very effective. Doctors can prescribe medications to reduce sound intolerance. Some medications are antidepressants, anti-anxiety drugs, migraine medications, and anti-seizure drugs. Prolonged use of these drugs is not recommended at all because of considerable side effects.

Devices may also be used to counteract hyperacusis and other forms of hearing hypersensitivity. Two common devices are earplugs and tinnitus maskers. Earplugs, however, cannot offer long term benefits because they hinder the process of habituation. For you to be able to adapt to the noises, you should be able to hear them, and earplugs do the opposite. Tinnitus maskers, on the other hand, are designed especially for tinnitus sufferers. Masking devices help people be able to tolerate noise.

Sometimes abnormal hearing sensitivity is dealt with through psychological approaches. Counseling may be done to help patients understand that what they are going through is not threatening at all. A more thorough approach is retraining therapy, in which similar therapy applied to tinnitus sufferers is ordered. It is a combination of psychotherapy and sound therapy. One reason affected people should go to psychologists is to help them cope with depression or anxiety that develops as they suffer from their abnormal hearing.

Surgery becomes an ultimate option, but is only chosen if the patient is suffering from dysfunctional cochlea or severe hearing loss due to physical abnormalities within the hearing system.

There are certain things you should do to keep your suffering at a minimum. Exposure to noise should be avoided, especially loud sound or music, because it could damage your hearing further, leading to worsening case of your hypersensitive hearing. Caffeine and alcohol should be kept away, as they cause disturbances in your blood pressure and body chemistry. Also, avoid substances that trigger migraine; such substances include MSG, chocolate, and aged cheese. Certain medications should be discontinued; ask your doctor regarding safe drugs that are not ototoxic.