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If your dispenser advises you to wear two hearing aids, here are several compelling reasons:
Auditory intelligence
The two parts of the brain work together to produce an audio image. The brain transforms the two images your eyes view into a single picture, and the same spatial perception occurs with your hearing. The various signals sent by each ear enable this perception, requiring less concentration and making listening simpler and more comfortable. If the two parts of the brain do not share auditory impulses, auditory intelligence suffers severely.
Two Ears Hear Much Better In Noise
Background noise is the most significant issue for most people with hearing loss when it comes to hearing clarity of speech. The brain has a remarkable ability to filter out, or suppress, undesired sound signals, making it simpler to hear speech in noise. Unfortunately, it requires both sides of the brain to accomplish this, resulting in two sound signals. The one-eared listener hears all sounds and noises combined and rarely obtains satisfactory outcomes in noisy circumstances.
Localisation
The brain can detect minuscule timing changes between a sound source entering each ear, allowing us to determine where it came from, up, down, and 360° around. One-eared listeners cannot hear these timing discrepancies and hence fail to determine where sounds originate.
Auditory Deprivation
Hearing occurs in the brain, not the ears, and is transmitted as a series of electrical impulses via nerves. When nerves are not stimulated, dead zones form in the brain, and the brain reorganizes to make better use of the available space. So, if you have a hearing loss, these nerves are rerouted to do different activities. While this can be reversed, studies show that prolonged lack of stimulation causes ‘auditory deprivation’. This means that the hearing may never be restored, and we may never be able to provide clarity again. This is a significant concern for people who refuse to wear hearing aids or who wear only one aid for an extended period of time.
No Dead Side
With two ears, we can plainly hear noises from both sides. Monaural listeners frequently have to turn their heads to hear people on the other side. This is related to the ‘head shadow effect,’ in which the size of our heads prevents particular frequency sound signals from reaching the opposing ear at the necessary loudness to be heard clearly. This can make meetings extremely difficult, among other things.
And Finally… Quality Of Life!
The majority of people who have worn both binaural and monaural fittings report that using two hearing aids improves their quality of life significantly.