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ABSTRACT

The evolution of the hearing aid is highly competitive now days.This is because electronics can produce something which can make mankind some better than existing technology. Similarly in our paper we are implementing the most efficient VLSI in to Hearing Aid. The feature of VLSI is known to all. Their main advantage is small in size.

Here we are producing a tooth using VLSI design. This tooth performs the function of Amplifier, Noise Rectifier, Voice Processor, etc.Another bud is also placed in the EAR which contains a microphone and a micro speaker. This microphone is connected to the VLSI designed tooth via radio waves and the same for Micro speaker also. This technology looks somewhat odd but the fact is really beneficial .Here we are replacing the external microphone and the amplifier equipment by the VLSI designed Tooth.

INTRODUCTION

As said in the abstract our hearing aid consist of two instruments namely a 1.EAR BUD and 2.VLSI designed TOOTH. How these two instruments communicate? These two instruments communicate by radio waves having the air filled chamber present between the mouth and the ear. This air space also helps in direct vibration of the 3 bones present inside the ear.

OBJECTIVE

We can able to give approximately 80% rectification from deafness using this method .We have kept a VLSI designed tooth so that the person using it won’t feel like having the hearing aid with him. And he need not try to hide anything from others which happens in the case of older versions.

Replacement of original tooth

As showm in the above diagrams,The root cavity is removed and an artificial root is placed this root consists of small battries(cells),(fig 2) which acts as power source for the entire tooth unit.then the vlsi designed tooth is palced over the root made by battries.Before going to the tooth in detail we can see the mechanism involved in this machine.figure 3&4 shows how to fix the VLSI designed tooth over the root as the cap.

Mechanism

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Here we are using the Eustachian chamber as the mediu of communication.as said before the bud placed inside the ear and the amplification chamber placed in the tooth has to commun icate.

STEP 1:

The electronic bud consisits of microphone and a microspeaker,and a small modulating and demodulaing unit is placed in between both this unit.

STEP 2:

Initially the micro phone receive the audio signal from the external world and modulate them to a small frequency level so that it can be sent to the tooth convinently.

STEP 3:

At the tooth the signal is received and it is prcocessed this process is explained below in detail.

STEP 4:

After the process the signal is transmitted to the micro speaker via the Eustachian chamber.now the partially deaf person can hear with better quality.

STEP 5:

The amplification is not only by this method but it is also possible by vibrating the 3 bones directly without the help of the Ear drum.

STEP 6:

It is possible to fetch the impulse to the nerve by synchonising the frequency output of the tooth and the nerve axon.Thus this method compresses the mecahnism of ordinary hearing aid and also the special function as stated above .

DESIGN OF THE TOOTH

RECEIVER UNIT

The receiver unit is designed in such a way that it has to receive the input from the microphone, highly sensitive microphone and receiver circuit is used because the waves have to travel in a chamber where the loss can be high. And also the path Is not a straight line the waves has to take few diversions to reach the receiver.

VOICE PROCESSOR

The voice signal of 3-5kz is alone taken for consideration and neglecting other sound for more efficiency. The signal is cover ted in to digital signal and the analyzed. This analog to digital conversion and then converting back to original analog signal is much useful in clarity as well as for performance. 

AMPLIFIER

The amplifier is for better clarity and quality, there are chances for message to be lost during the transmission so the signal is amplified and then given to the micro speaker.

RF UNIT

The RF unit is the important region of this design and it makes this hearing aid from the other Hearing aid. The frequency is tuned in such a way that it has to match with the natural frequency of the auditory nerves.

TRANSMITTER

This transmitter is designed in such a way that it has to transform the amplified audio signal to the micro speaker and also it has to transmit the modulated radio frequency to the nerves and bones.

BATTERY

This unit serves as the power source for the entire unit. It is located at the root of the tooth. The power required for the VLSI designed tooth is not much so a lesser voltage is enough. The battery can be replaced even manually by the user himself also by just removing the cap.

SCHEMATIC FIGURE FOR WORKING

DOWNLOAD FULL REPORT – PRESENTATION TOPICS FOR ELECTRONICS ON ‘Hearing aid tooth’

JJ

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur.
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1 Comment

  1. Gian Carlo says:

    Man,please send me the circuit diagram and papers of poorman’s hearing aid..thanks

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