1. EE 4OI4 DESIGN PROJECT

2. Hamed Mazhab jafari ID#:0060538

3. Hearing Aid System For my design project I will be designing and implementing a Hearing Aid system

4. BACKGROUND INFO Hearing aids partially overcome the deficits associated with sensorineural hearing loss.Hearing aids partially overcome the deficits associated with sensorineural hearing loss.

5. BACKGROUND INFO Hearing aid system should have the following characteristics:Hearing aid system should have the following characteristics: 1-hearing aid has to amplify weak sounds more than it amplifies intense sounds.

6. BACKGROUND INFO 2- Hearing aid systems should have a high SNR, because people with sensorineural hearing loss will experience a decrease in their frequency resolution. Which means that they can not separate sound at different frequencies

7. BACKGROUND INFO 3-Hearing loss is not constant over all the frequencies. As a result the hearing aid system should be able to provide different gain for different frequencies.

8. BACKGROUND INFO 4- Hearing impaired person will have decreased temporal resolution. Therefore hearing aid systems should have fast acting compression, where the gain is rapidly increased during weak sounds and rapidly decreased during intense sound.

9. Hearing Aid Design Converts incoming sounds into electrical signals using a microphone.Converts incoming sounds into electrical signals using a microphone. Amplifies the signal depending on its intensity level and its frequency.Amplifies the signal depending on its intensity level and its frequency. Converts the electrical signal back to the sound using a receiver.Converts the electrical signal back to the sound using a receiver.

10. Hearing Aid Design Simple Block Diagram Pre Amp& VGA Out put Buffer Input buffer Microphone Receiver Compression control Average Detector & LPF

11. Gantt Chart The following Gantt chart illustrates how we will be distributing our time on the projectThe following Gantt chart illustrates how we will be distributing our time on the project