EMI Presentation about sound sensor.pptx

Presentation about sound sensor

1. “PRESENTATION TITLE” SOUND SENSOR

2. GROUP MEMBERS NAME : (1) ALI ABBAS FA20-BEE-066 (2) TALHA MUHAMMAD FA20-BEE-088 (3) AWAIS RAZZAQ FA20-BEE-080 (4) MUHAMMAD AMMAR FA20-BEE-177

3. What is sound Sensor ? A sound sensor is a device that detects the sound waves through its intensity and converts these waves into electrical signals . It only detects the existence of sound according to the principle of vibration . It is used to receive the acoustic waves and display the vibration image of sound .

4. TYPES OF SENSORS OR MICROPHONE : There are Three Types of Sound Sensor: Carbon Microphone : it is type of microphone that convert Sounds into Electrical Audio Signals. Consists of two metals plates seperated by granules of Carbon. Ribbon Microphone: It converts sound waves via electromagnetic induction .It have conductive ribbons like diaphragm and simple circuitry.

5. Dynamic Microphone: This sound sensor type is widely used for stage, musical performances and other applications. It is one of the most widely used forms of free standing microphones. It has a simple design and offers cost effective microphones.

6. SOUND SENSOR HISTORY: The sound sensor was not invented by only one person. In 1861 Johann Phillip Reis first invented a sound detector . In 1861, Philipp Reis succeeded  in creating a device that captured sound . He successfully converted it to electrical impulses which were transmitted via electrical wires to another device. Then it transformed these pulses into recognizable sounds similar to the original acoustical source.

7. BLOCK DIAGRAM:

8. CIRCUIT DIAGRAM:

9. WORKING : The working principle of this sensor is similar to Human ears. Because human ear includes a diaphragm and the main function of this  diaphragm  is, it uses the vibrations and changes into signals. Audio devices uses the sound sensors to convert sound into electric signal such as MICROPHONES . Sound sensor has a thin piece of material that is known as diaphragm that vibrates when hit by sound waves These vibrations are converted by the sensor in to the electric signal

10. The air pressure vibrations makes the diaphragm move and this diaphragm motion is sensed by sensor and converted it into the electrical signal . The LEGO sound sensor is similar to microphone and it can sense a sound level but it cannot detect sound frequency .

11. Sound Sensor Module Pin Diagram:

12. Pin Number Pin Name Description 1 VCC +5 v power supply 2 GND Ground (-) power supply 3 OUT Digital Output  (0 or 1)

13. Sound Sensor Hardware Overview:

14. Features The features of the sound sensor include the following These sensors are very simple to use It gives analog output signal. Simply incorporates using logic modules on the input area

15. APPLICATIONS : They are used for the security systems . It is easy to manipulate sound in real time . They are easily affordable . Wireless sound sensors provide great freedom while speaking .It does not need cabling as compared to wired mic .

16. Specifications: The specifications of the sound sensor include the following The range of operating voltage is 3.⅗ V The operating current is 4~5 mA The voltage gain 26 dB ((V=6V, f=1kHz) The sensitivity of the microphone (1kHz) is 52 to 48 dB The impedance of the microphone is 2.2k Ohm The frequency of m microphone is16 to 20 kHz The signal to noise ratio is 54 dB