Sound sensor

A sound sensor is defined as a module that detects sound waves through their intensity and converting it to electrical signals.

How does the sound sensor works?

Sound sensors work by converting sound energy into electrical energy. The sound sensor consists of a diaphragm, a magnet, a coil, and some wires. When sound hits the diaphragm, the diaphragm moves. The magnet and coil then convert that motion into electricity. When the sound sensor is attached to a microcontroller like Arduino. The electrical signal can be read. The microcontroller can then coded to respond to the signal and do things like turn lights on and off in response to sounds.

Benefits of sound sensor

• Sound sensors are used for security systems.
• Sound sensors are easily affordable.
• Wireless sound sensors provide great freedom while speaking. Besides, it does not require cabling as compared to a wired mic.
• Sound sensors work with speech recognition software where sound or speech is converted to text. This is also used by disabled people.

Drawbacks of sound sensor

• Sound files require more memory size.
• The wireless microphones have a limited coverage range.
• Due to battery life, the Operation time of the wireless microphone is limited.
• Voice recognition software is not very accurate to compare to manual typing. e.g it is difficult to distinguish between keywords like “some” and “sum”.

Applications

• Sound sensor used in Security and Monitoring systems such as door alarm, burglar alarms, etc.
• It is also used in Home automation such as lighting your house by detecting whistle/clap instead of physically turning the light switch.
• It is also used in ambient sound recognition and sound level recognition.