- Device use to convert sound waves into electrical signals.
- Consists of diaphragm located at the head of microphone and other components.
- Commonly used in day-today life in telephones, tape recorders, radio and television broadcasting.
- Diaphragm is made up of thin piece of material such as paper, plastic or aluminium.
- Diaphragm vibrates when it is strucked by sound waves.
- This causes other components in microphone to vibrate.
- These vibrations are converted into electric current which becomes audio signals.
- Consists of induction coil, magnet and a plastic diaphragm.
- It uses electromagnetic principle to convert sound energy into electrical energy.
- Diaphragm is attached to the coil, between two magnets which makes it enclose in magnetic field.
- When sound hits the diaphragm it vibrates and creates an electric current.
- This electric current is too little to make a sound so it is passed to sound amplifier to increase the strength.
- Less expensive and not efficient quality of recording.
- Used in recording of drum, guitar and other musical instruments.
- Capacitor is used in it to convert acoustical energy to electrical energy.
- Capacitor consists of two conducting plates inside the microphone, one is fixed and other is free to move made up of very light material that acts as a diaphragm.
- Diaphragm vibrates when it is struck by sound waves, this changes the distance between two plates and creates a change in the capacitance which produces electric current.
- Expensive than dynamic microphones since quality of sound is better.
- Used in studio recording.
Microphones are also classified depending upon the audio capturing patterns as
- Captures sound from all the directions.
- Best suited for group discussion and for good quality sound, mic should be held near.
- Captures sound from a specific point and blocks surrounding noise.
- Great for focusing on specific sound like recording drum beats in studio.
- Captures sounds mostly from front, some from side and bit from behind.
- Pattern shape is somewhat heart-shaped.
- Used in handheld microphones.
- Use specific type of microphone for better quality.
- Keep a some distance between your sound source and microphone.
- Check and test the microphone before getting started.
- Record sound in closed room to avoid background effects.
- Dont make it too fancy, but keep it simple.