Advantages of Sound sensor | Disadvantages of Sound sensor

This page covers advantages and disadvantages of Sound sensor. It mentions Sound sensor advantages and Sound sensor disadvantages.

Definition: The sensor which converts air pressure variations due to sound into electrical current is known as sound sensor. They are dynamic and use induction coil placed in the magnetic field (H) of permanent magnet attached with the diaphragm. The sound sensors are popularly known by microphones.

Following are the types of sound sensors.
• Dynamic Microphone (Use Electromagnetic Induction)
• Carbon Microphone
• Ribbon Microphone
• Condenser Microphone (Use capacitance change)
• Piezoelectric microphone (Use piezoelectricity)

dynamic microphone with sound sensor

The sound sensors are usually connected with pre-amplifier before sound is being recorded or transmitted or given to loudspeaker for people to listen. It is used everywhere in homes, offices for indoor and outdoor applications. The figure-1 depicts dynamic microphone type.
Refer Microphone basics and types >> and Microphone vs Loudspeaker >> for more information.

Advantages of Sound sensor

Following are the advantages of Sound sensor :
➨They are used for security systems.
➨Often it works with speech recognition software where in sound or speech is converted to text. This is faster approach compare to typing using keyboard. This is also used by disabled people.
➨It is easy to manipulate sound in real time. Hence earlier recording is not needed.
➨The sound sensors are used while driving by switching on the radio. This helps in improving safety using voice activation system based on sound sensor.
➨They are easily affordable.
➨Wireless sound sensors provide great freedom while speaking. Moreover it does not require cabling compare to wired mic.

Disadvantages of Sound sensor

Following are the disadvantages of Sound sensor :
➨Sound files require more memory size.
➨Voice recognition softwares are not very accurate compare to manual typing.
Example: It is difficult to distinguish between keywords e.g. "there" and "their".
➨Often it picks up near by radio signals and hence interference cancellation microphones are needed. This increases cost of the microphone.
➨The wireless microphones have limited coverage range.
➨Operation time of wireless microphone is limited due to battery life. This is shorter compare to condenser microphone.
➨Often sound sensors are required to be mounted on cards for specific applications. This increases use of hardware.

Advantages and Disadvantages of other Sensor Types

Capacitive    Inductive    Photoelectric    Ultrasonic    Infrared    Motion    Biometric    Force    Humidity    Temperature    Light    Barometer    Sound    pH    Soil Moisture   

Different types of Sensors Related links

Article on Sensors and Transducers>>
Proximity Sensor
Occupancy Sensor vs Motion Sensor
LVDT and RVDT sensor
Position, displacement and level sensor
force sensor and strain sensor
temperature sensor
pressure sensor
Humidity sensor
MEMS sensor
Touch sensor
Haptic sensor
Wireless sensor

RF and Wireless Terminologies