How hearing aids my help reduce tinnitus.
Here is a 2007 study on this:
http://www.ncbi.nlm.nih.gov/pubmed/17956798
Prog Brain Res. 2007;166:341-5.
Hearing aids for the treatment of tinnitus.
Del Bo L1,
Ambrosetti U.
Author information
Abstract
Clinical evidence shows that the use of hearing aids in tinnitus patients provides two benefits: it makes the patient less aware of the tinnitus and it improves communication by reducing the annoying sensation that sounds and voices are masked by the tinnitus. Hearing loss reduces stimulation from external sounds resulting in increased awareness of tinnitus and deprivation of input may change the function of structures of the auditory pathways. Tinnitus is often caused by expression of neural plasticity evoked by deprivation of auditory input. With hearing aid amplification, external sounds can provide sufficient activation of the auditory nervous system to reduce the tinnitus perception and
it may elicit expression of neural plasticity that can reprogram the auditory nervous system and thereby have a long-term beneficial effect on tinnitus by restoring neural function. [emphasis added] To obtain the best results, hearing aids should be fitted to both ears, use an open ear aid with the widest amplification band, and disabled noise reducing controls. In some cases a combination device would be preferable. The conditions required in order to obtain good results include not only the use of devices, but above all, their adaptation to the needs of the single patient, by counseling and customization. Wearing the hearing aid must become second nature to the patient even though it is only one element of the therapy.
Here is more information from the BTA; please go to their site for a fuller explanation:
http://www.tinnitus.org.uk/can-hearing-aids-help-people-with-tinnitus
Hearing aids for the treatment of tinnitus
There is evidence to suggest hearing aids can mask tinnitus sounds to help improve communication and reduce stress and anxiety levels, which normally exacerbate tinnitus. The loudness and prominence of tinnitus is decreased by activating the auditory system and amplifying background sound. The knowledge that you can mask tinnitus with a hearing aid is not an innovative concept, but previous hearing aids occluded the ear canal with a tight fitting ear mould. Patients reported a hollow reverberation amplifying chewing sounds and the sensation of tinnitus. A new type of hearing aid called the open-fit has been designed to successfully alleviate tinnitus symptoms by introducing a noise-reduction control. The slim tube connected to the hearing aid is cosmetically appealing, comfortable to wear, as well as eliminating external sound sources without interfering with the transmission of sounds from the outer ear to the inner ear.
Studies have shown robust evidence promoting hearing aid fitting as an effective treatment option of tinnitus control. The provision of hearing aids decreased the severity of tinnitus in 69% of bilaterally aided patients and 67% of unilateral aided patients.ª Similarly, research undertaken by Del Bo et al, (2006)º showed successful results for 22 patients fitted with open-fit hearing aids in alleviating symptomatic tinnitus perception. The participants in this study had a mild-moderate hearing loss predominately in the 2-6 kHz frequency range. The pitch of tinnitus is often detected in the 3-8 kHz range. In conjunction with hearing aid fitting, all patients had tinnitus retraining therapy, which proved to be effective at habituating sound perception, allowing the patient to ignore the presence of tinnitus over a period of six months.
How can hearing aids help?
If you have a hearing loss, a hearing aid can help with managing tinnitus by offering sound therapy in the following ways:
- increase the information available to the brain by amplifying background sounds making the tinnitus seem less audible.
- improve communication with others, therefore reducing stress levels.
- helping to compensate for your hearing loss.
- help you to habituate to tinnitus sounds.
Conclusion
One of the main reasons why open-fit hearing aids have been successful in tinnitus patients is because they do not significantly occlude the ear canal, which can aggravate tinnitus symptoms and, therefore, do not interfere with external sound transmission. They provide sufficient amplification in patients with a mild-moderate hearing loss, have an in-built noise reducing control, and are perceived as highly comfortable. In conclusion, the combination of using a hearing aid and employing counselling techniques will equip the patient with tinnitus and a mild-moderate hearing loss in the 2- 6 kHz region to habituate to their tinnitus and learn how to manage symptoms better.