Dec 21 2010
Patients lose their voices permanently when the larynxes are removed in case of throat cancer. An innovative technology has been developed in Yorkshire for providing the patients their voices back after operation. In order to achieve this, the scientists from Hull and Sheffield universities, along with Hull-based doctors are advancing a system that can regenerate the organs artificially.
The prevailing technique for speech restoration employs the implantation of a silicone valve in the throat to redirect the air from lungs to produce vibration and thus produce speech. But, the fluid generated in the body will block these devises after a certain period, stopping its function. Other process encompasses the use of electro-larynxes and handheld equipments to produce noise, but the resulting sound is electronic and difficult to understand.
In this novel technology, array of magnets are placed inside the mouth, producing a mobile three-dimensional magnetic field. This magnetic field is measured and is used for determining particular words and speech patterns. For the primary trial, magnetic sensors were fixed on the frames worn by test candidates. A database having 57 words were produced and the magnetic sensor measurements were then compared to regenerate speech.
A result showing 98 % recognition was identified, delivering necessary commands and instructions. This technology can further be used for taking recordings before the surgery for producing speech synthesisers, eliminating the need of artificial voices. According to James Gilbert, Project leader of Hull University's department of engineering, further advancements in this research aspect will help advancing laryngectomies and will permit the patients to lead a normal life, without reminding them about their condition. This scheme is financially supported by the Henry Smith Charity and Action Medical Research.
Source: http://www.hull.ac.uk