The FM system is a wireless assistive listening device.
What are the parts of a FM system?
1. Microphone
Based on individual needs, different microphones are available, which may be worn or connected to the sound source, these are:
a) Lapel Microphone
b) Direct Microphone
c) Conference Microphone
d) Boom Microphone
2. Transmitter
The FM transmitter receives the signal from the microphone and then sends it to the FM receiver.
The distance between the receiver and the transmitter should not exceed 50 feet.
3. Receiver
The FM receiver gets the signal from the transmitter and sends it to a personal hearing aid, cochlear implant processor or any alternative device.
They are usually smaller in size in case of hearing aid where the receiver is inbuilt.
How does it work?
As it is a wireless device it can transmit the sound signal from a distance.
Basically FM system transmits the radiofrequency waves and it consists of microphone where the sound signal is sent at a particular frequency and receiver must be tuned to the same frequency in order to receive the transmission.
The microphone is placed near or connected to the sound source and the receiver is worn by the listener where the sound or speech is heard and there is deduction in background noise to enable clarity while hearing.
Uses and Advantages of the FM system
If you are wearing a hearing aid the use of an FM system will help reduce the background noise and maintain good quality and clearance of the signal.
FM systems are generally used in classroom setting. When using a personal FM system the microphone is worn by the teacher and voice is amplified by using the microphone and the signal is sent to the receiver worn by the student.
Another use of the FM is found in large auditoriums and theatres where the signal of a predetermined frequency is sent through the worn device aided by a traditional headset or a hearing aid.
Written By - Pratthiksha shree A
Edited By - Tushna Choksey
Social