Digital hearing aid was introduced in the market in the year 1987 and was considered as a revolutionary invention in the life of hearing impaired people. In spite of the fact that it was quite useful it did not gain its due recognition as the digital hearing aid was of large size and it quickly drain out the battery. Due to the drawbacks digital hearing aids was not preferred by many thus to overcome these problems and make it a quite useful product these were modified with the help of the improved technology. This improved digital hearing aid gained immense recognition and was preferred by users, practitioners, and audiologists. However it was expensive but still manages to gained popularity. Advantage over Analog Hearing Aid The technology behind the digital hearing aid improved day by day and more efforts were put in to make this device highly useful and responsive. The technologically improved digital hearing aid was well appreciated by the audiologists and users due to numerous beneficiaries. Analog hearing aid is responsible only for increasing the sound level, whereas digital hearing aid enhances the sound clarity as well. It further helps one to distinguish between different types of sound. With digital hearing aid one can easily identify the difference between speech and background noise resulting in clarity in conversation. Working of Digital Hearing Aid Digital hearing aid device catches the incoming signals from the microphone and converts this digital signal into digital format using a computer chip and process it using digital technology before converting it back to analog sound that is delivered back to the ear. Algorithm are written according to digital signal processing so that digital hearing aid is customized according to individual hear loss. Sophisticated range of digital hearing aid is well capable of amplifying even the softest sound and it also eliminates unwanted noise to provide clear sound to the ear. Some of the digital hearing aid is also available with volume control feature. Striking Features of Digital Hearing Aids Digital hearing aids are designed completely keeping in mind the problems and requirements of hearing impaired people. This highly durable, versatile and high tech operated digital hearing aid is known for multifarious functions like digital speech enhancement, digital feedback reduction, digital noise reduction, digital static protection and directional microphone. Due to the above stated functions and feature digital hearing aid is considered as a much adaptive and dynamic device enhancing the hearing efficiency of the hearing impaired people.
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