Navigation menu
 
audio file converter software for music production and hi‑end audio
Optimize music files to reach your device’s sound quality limit, get compatible audio format or save disk space. Read more...

What is Voltage [Audio Physics for Beginners]

Audio Basis - articles about audio

Read in this article, that is voltage, in the context of audio as physics part. Keep reading...

Optimize music files
 to reach your device's sound quality limit,
get compatible audio format or save disk space

 
AuI ConverteR 48x44
 audio file converter software for
 for music production and descerning music lovers

FLAC, DSF, DFF, SACD ISO, mp3, m4a, CUE, CD...
 
We think about quality. You just work with music.
AuI ConverteR 48x44 - audio converte software
DOWNLOAD FREE
[Windows]
DOWNLOAD FREE
[Mac]
What is Voltage

 

What is electricity

Electricity is a field that can move electrons (charged particles).

Let’s imagine electrons as small balls.

The field is a difference between some levels of voltage.

The difference creates a mechanical force that moves electrons.

 

 

What is electrical voltage


Let’s look example that is well-known to everybody.

If a ball is lying on the ground, it has zero voltage.

If we lift the ball under the ground, we can consider as «voltage» a difference between the lifted ball and one on the ground.
 

Voltage is the potential of an electron,
like the potential of a ball that is held in hands above ground

Voltage audio signal

 

 

If we release the ball, it falls to the ground due to the «voltage». And the ball beat ground.

If we lift the ball upper than before, it will punch the ground harder.

So upper position has a higher «voltage».

In the example, you may replace the gravitation with an electric field.

Voltage is called U.

Usually, an audio signal is considered as an altering of the voltage in the time.
 

Changing the voltage of the audio signal in time.

Voltage in time

 

Frequently Asked Questions

Is audio signal voltage or current?

Voltage and electrical current are linked things. Voltage growth causes a rise of current and vice versa.

Some power sources are voltage sources. They generate a set voltage. Their inner resistance (impedance) is low.

Other ones are current sources. They generate a set current. Their impedance is high.

As rule, in audio, we operate voltage sources.

 

Is audio signal DC or AC?

Audio signal is electical analog of acoustic oscillations.

Audio signal is an electical signal. It is generated due to impact of acoustic wave to microphone. The acoustic wave is oscillation. Thus, the electrical signal is oscillation too.

Audio signal is alternating current (AC).

 

In the next articles, we will consider step-by-step how voltage relates to sound.

Electric current >

 

Yuri Korzunov,

Audiophile Inventory's developer

December 9, 2022 updated | since August 4, 2017