Audio signals transferred by a light source

In summary, the conversation discusses the possibility of sending audio signals through a light bulb instead of a laser pointer. The speaker mentions that while using a light bulb may not be as accurate as a laser, it is still possible and has been done before. The distance between the light source and receiver may affect the volume, but only if using a non-laser light source. The speaker is excited about the potential effects of using a light bulb for this project.
  • #1
cynricng
3
0
Hi, I am currently working on a little science project, I came across this page about sending audio signals through a laser pointer.

http://www.i-hacked.com/content/view/162/44/

I was wondering if it is possible if I did it with an ordinary light bulb.

It said that the data is transferred by the light's amplitude, so if I were to use a light bulb instead of a laser point, does it kind of mess up the signal if I were to stand closer or farther from the receiver? Or does the audio output on the receiver will just have a lower volume if I stand farther away?

Thanks.
 
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  • #2
The problem with an incandescent light bulb is that it's response time is slow and may not accurately transmit higher frequency sound waves, But it's not impossible. I remember seeing a project for what you are describing using light bulbs when I was a kid. You could also do it with LEDs.
 
  • #3
LEDs would seem to be the closest thing I have in mind.

But will the distance of the light and the receiver change the volume?
 
  • #4
No, The distance shouldn't affect the volume (provided the device you are using is dependent upon luminosity for volume) if you have a true laser... because the luminosity would be relatively constant... no diffusion, but if you are using an incandescent bulb or LED then yes distance will affect the volume.
 
  • #5
Oooh, i get it.

That's exactly the effect that I was hoping for.

Thanks.
 

Related to Audio signals transferred by a light source

What is the principle behind transferring audio signals through a light source?

The principle behind transferring audio signals through a light source is called optical communication. This involves converting the audio signal into light waves, which are then transmitted through a fiber optic cable to a receiver. The receiver then converts the light waves back into an electrical signal, which can be amplified and played as sound.

What are the advantages of using a light source to transfer audio signals?

Using a light source to transfer audio signals has several advantages. First, it allows for long-distance communication without any loss of signal quality. Light waves travel much faster and farther than electrical signals, making it a more efficient method of transmission. Additionally, using light eliminates the risk of electromagnetic interference, which can degrade the quality of the audio signal.

What types of light sources are typically used for transferring audio signals?

There are various types of light sources that can be used for transferring audio signals. One common type is a laser diode, which emits a narrow and focused beam of light. Another type is a light-emitting diode (LED), which emits a broader and less focused beam of light. Both of these options are commonly used in fiber optic communication systems.

How does the quality of the light source affect the audio signal?

The quality of the light source can have a significant impact on the audio signal being transferred. A higher quality light source, such as a laser diode, will produce a more focused and consistent beam of light, resulting in a clearer and stronger audio signal. A lower quality light source, such as a standard LED, may produce a weaker and more scattered light beam, leading to a lower quality audio signal.

Are there any limitations or challenges when using a light source to transfer audio signals?

Yes, there are some limitations and challenges when using a light source to transfer audio signals. One major limitation is the need for a clear line of sight between the transmitter and receiver. Any physical obstructions or interference can disrupt the light beam and cause a loss of signal. Additionally, the use of fiber optic cables can be expensive and require specialized equipment for installation and maintenance.

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