The listening to capability of any individual can lower with age; so he/she is going to face too many issues. Listening to assist is an answer that may makes the sound louder so he/she will hear, talk extra totally in each exercise.
Listening to assist is a small dimension digital machine by which an individual with listening to loss can hear as clear as an everyday individual.
There are three main part of a listening to assist:
- Microphone: – to transform audio sign into electrical sign
- Amplifier : – to strengthens the alerts (utilizing transistor)
- Receiver : – to transform electrical sign into sound waves .
we use earphone as receiver in order to transform electrical sign into sound waves and even it’s simple to make use of it.
Working
The Electret Microphone(condenser mic)is used to transform sound sign into electrical sign.To amlify these electrical sign we use transistor’s as transistor is used for amplification. Right here in our proposed listening to assist challenge we use mixture of 3-npn(BC-548,BC-107,BC-107)& 1-pnp(sk-100)transistor as amplifier.
The output electrical sign from microphone is amplified by transistors BC-548 and this amplified sign is utilized to the bottom of Metallic transistor BC-107for additional amplification. We use right here a 1µF,63V coupling capacitor to go this amplified sign to the bottom of one other Metallic transistor BC-107.
This amplified electrical sign is utilized to a metallic pnp transistor SK100 to drive Cellular earphone,which is able to convert the incoming amplified electrical sign into sound sign.we use cellular earphone as receiver,it’s worn over and put into the ear throughout use.Right here we additionally use a 4.7 okay POT to minimise the pitch of sound to a minimal degree throughout very louder sound which is inconvenient for the consumer.It’s for consumer security as throughout very louder sound like practice horn on a railway station the consumer can transfer the wiper of 4.7k pot in order that the sound is not going to annoying.
So in a short of our proposed challenge ,first we convert the sound sign into electrical sign than increase it through totally different transistor mixture and than once more reconvert the boosted electrical sign into sound sign in order that the sooner sign which was not audible by somebody is now audible as a result of its excessive pitch.
Benefit
- 1.Our proposed Listening to assist could make communication simpler for an individual with listening to loss(principally age-related listening to loss).
- It will possibly simply be assembled and straightforward to make use of as solely we have to put earphone in ear and remainder of the circuit in pocket after assembled on a small PCB.
| LIST OF COMPONENTS | ||
| NAME | QUANTITY | APPROX. COST |
| ELECTRET MICROPHONE (CONDENSER MIC) | 1 | 30/- |
| MOBILE EARPHONE LEAD | 1 | 100/- |
| BREADBOARD | 1 | 45/- |
| 3.7 VOLT CELL | 1 | 40/– |
| TRANSISTOR BC-548 | 1 | 10/- |
| TRANSISTOR BC-107 | 2 | 10*2=20/- |
| TRANSISTOR SK-100 | 1 | 20/- |
| LED | 1 | 2/- |
| 220OHM RESISTOR | 1 | 1/- |
| POT-4.7K | 1 | 15/- |
| CAPACITOR- 1µF,63V | 1 | 10/- |
| CAPACITOR- 100µF,25V | 2 | 10*2=20/- |
| CAPACITOR- 0.1µF(104) | 2 | 2*2=4/- |
| REGISTOR- 2.2 KΩ | 2 | 2*2=4/- |
| REGISTOR- 680 KΩ | 1 | 2/- |
| REGISTOR- 100 KΩ | 1 | 2/ |
| REGISTOR- 180 KΩ | 1 | 2/ |
| REGISTOR- 1.5 KΩ | 1 | 2/ |
| REGISTOR- 220 Ω | 1 | 2/ |
| REGISTOR- 3.3 KΩ | 1 | 2/ |
The writer Rakesh Jain obtained Grasp diploma in VLSI, B.E. in electronics and communication, DIPLOMA in electronics. He’s at the moment working as an Assistant professor in ECE division in Geetanjali institute of technical research, Udaipur. His analysis space is SENSOR and Microcontroller. He has 24 copyright and three Indian patents.
