what is sound recording| magnetic|digital advantages,disadvantages.

what is Sound Recording?

(Hello friends! Today I will tell you about what is sound recording (what is sound recording and how is it recorded) in this article, so let's start) 
Sound Recording: Sound recording is the electrical, mechanical, electronic or digital inscription (record) of sound waves. sound recording Sound waves are stored in a storage medium.Can hear more than once.
History of sound recording, Types of sound recording, First sound recording, Sound recording and reproduction video, The evolution of sound recording ,Sound recording app ,Sound recording software, How is sound recorded digitally.

There are different ways of storing a sound in a medium, some of which are as follows:

1). magnetic recording

2). digital recording

magnetic recording: 

In magnetic recording, data (audio signal) is stored in a magnetized medium as an electrical signal. It is used a lot to record audio signals.

Magnetic recording works on the principle of electromagnetic induction. For this, audio tapes are coated with magnetic material. The signal currents generate the magnetization in the tape, creating a magnetic path in the tape.

The audio signal for audio recording is delivered to the microphone which converts the signal into an electrical pulse. This electrical signal is amplified and then the amplified current is passed through the audio head coil.

This current magnetizes the head coil. And thus the magnetic power of the head changes according to the intensity of the audio signal generated by the microphone. Now this magnetized audio head is moved onto the audio tape.

The audio tape is covered with a layer of ferromagnetic material, so the tape also becomes magnetized and the head coil rotates according to the signal. Thus due to magnetic induction the magnetic track of the sound signal is formed on the tape.

magnetic recording methods:

1.  longitudinal magnetic

2.  transversal magnetic

3.  perpendicular magnetic

longitudinal magnetic recording: 

In this method the tape is rotated longitudinally (longitudinally) of the recording head. In this method, the north and south poles are placed on the same side of the tape.


transversal magnetic recording: 

In this method of recording, the poles of the recording head are kept transversal of the tape. This method requires a special structure for the recording head.


perpendicular magnetic recording:

In this manner, the tape moves normally towards the poles of the recording head. It has one pole on each side.


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Digital recording: 

In recording the sound in this manner, the sound signal is converted into pulses that correspond to the binary digit (0, 1) and is then stored in magnetic tape or optical disk.

It has an analog to digital converter (ADC) circuit. Number (bits) are generated from the microphone in this circuit. Each number is called a sample and the number of samples taken per second is called the sample rate.

A digital to analog converter (DAC) is used to convert the number back to sound. These are recorded after converting the waveform to bits. The tape rotates at a constant speed and contains data records per second.

In this, one block of data is recorded at a time. There is an erased portion in the middle of every block of data called a record gap. In digital recording, the tape is always saturated in the positive or negative direction. It displays '1' bit when the flux direction changes and '0' bit display when there is no change….. 

Advantages of digital recording:

1). The accuracy is high.

2). The structure of the device is simple.

Disadvantages of digital recording: 


1). The analog information has to be converted to binary format.

 2). Requires ADC and DAC converter.

(Request: - If this post has been helpful for you, then definitely share it with your friends and if you have any question related to your sound recording, then tell it by comment below. thanks.) 





Satish jagtap

Hello iam Satish jagtap Electrical engineer. From: Aurangabad, Maharashtra. Edu: MIT college of Engineering.

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