Compact Unidirectional Audio Speaker

In summary, the conversation is about developing a compact directional sound for detecting movement. The speaker being developed is on a small PCB board and the person is looking for suggestions for a commercial compact unidirectional speaker to mount on the board. They have tried a Google search but only found large-size speakers for home or office use. Another person suggests using ultrasound transducers for better directionality.
  • #1
1MK5
10
0
Hi everyone,

I am posting this thread just to find some information.

I have a science project which try to make a compact directional sound for detecting movement.

Now, the electronics which my group is developing is on a small PCB board (approximately 5x5 cm)

I am wondering if there are anyone here could suggest if there is a commercial compact (small) unidirectional speaker which I can mount on the PCB?

I have tried a Google search: Directional Speaker, or Unidirectional Audio speaker; and it gives me a list of large-size directional audio speaker for home or office applications.

Finally, I'd like to thanks in advance to everyone in the forum.

Cheers,

1MK5
 
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  • #2
Directivity in a speaker is dependent on the ratio of wavelenth to diameter.
Your speaker (or speaker array) will have to be at least as big as the wavelength to get reasonable directionality. Your best bet might be using four small ultrasound transducers in the corners of the PCB and making the frequency as high as practicable. (Attenuation)
You´ll find links to theory here: http://en.wikipedia.org/wiki/Directional_Sound
 

FAQ: Compact Unidirectional Audio Speaker

1. What is a compact unidirectional audio speaker?

A compact unidirectional audio speaker is a type of speaker that is designed to produce sound in a specific direction. It is smaller in size compared to traditional speakers and is ideal for use in small spaces or for personal use.

2. How does a compact unidirectional audio speaker work?

A compact unidirectional audio speaker works by using a single driver to produce sound waves in a specific direction. The driver is usually mounted on a horn or waveguide, which helps to direct the sound waves in a narrow beam. This results in a clearer and more focused sound compared to traditional speakers.

3. What are the benefits of using a compact unidirectional audio speaker?

Using a compact unidirectional audio speaker has several benefits. It allows for better sound quality in a specific direction, making it ideal for presentations, public speaking, or personal listening. It also requires less power to produce sound, making it energy-efficient.

4. Can a compact unidirectional audio speaker be used for outdoor events?

Yes, a compact unidirectional audio speaker can be used for outdoor events. However, it is important to consider the size and power output of the speaker to ensure it is suitable for the event. Additionally, factors such as wind and background noise should be taken into account when using a compact unidirectional audio speaker outdoors.

5. Are there any limitations to using a compact unidirectional audio speaker?

One limitation of using a compact unidirectional audio speaker is that it may not provide a well-rounded sound experience. As the sound is directed in a specific direction, it may not be suitable for large gatherings or situations where the audience is dispersed. Additionally, it may not be the best option for music performances or events that require a wide sound coverage.

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