LOW resonance PIEZO Electric drivers ?(do i have to make one?)

In summary: I have been up to make an impedance tube to measure acoustic Z and calculate absorption coefficient of materials . and having a sound generator(speaker driver) in it usually gives you near 60 hz response so your data will be charted starting 60hz and above. My goal is to measure from 20hz to 4khz . and its hard to stick a large box in one side of tube to get low response if possible .Anyhow I saw somewhere that they have used PIEZOELECTRIC as sound generator so they measure from 20hz.Question is where to find a piezo that resonances below 20hz ?or how to make one if I have to ...?ThanksIn summary,
  • #1
frd
4
0
I have been up to make an impedance tube to measure acoustic Z and calculate absorption coefficient of materials . and having a sound generator(speaker driver) in it usually gives you near 60 hz response so your data will be charted starting 60hz and above.

My goal is to measure from 20hz to 4khz . and its hard to stick a large box in one side of tube to get low response if possible .

Anyhow I saw somewhere that they have used PIEZOELECTRIC as sound generator so they measure from 20hz.

Question is where to find a piezo that resonances below 20hz ?

or how to make one if I have to ...?

Thanks
 
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  • #2
The reason people usually chart above 60Hz, as I understand it, is interference from the mains. Piezoelectric generators are good for extremely high frequencies. I'm not aware of any benefit at low frequencies.
 
  • #3
how are you sure i have a pdf of set up using piezo for extremely low resonances ...
 
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  • #4
frd said:
how are you sure i have a pdf of set up using piezo for extremely low resonances ...

Where did you see a PDF file mentioned in his response?
 
  • #5
frd said:
I have been up to make an impedance tube to measure acoustic Z and calculate absorption coefficient of materials . and having a sound generator(speaker driver) in it usually gives you near 60 hz response so your data will be charted starting 60hz and above.

My goal is to measure from 20hz to 4khz . and its hard to stick a large box in one side of tube to get low response if possible .

Anyhow I saw somewhere that they have used PIEZOELECTRIC as sound generator so they measure from 20hz.

Question is where to find a piezo that resonances below 20hz ?

or how to make one if I have to ...?

Thanks

If you want to generat good-quality sound, it's hard to beat the modern speakers with multiple elements and crossovers. And for measuring the acoustic attenuation (I'm not sure about the impedance you mention though), you can use a microphone before the material as the "Reference", and a microphone after the materal for the "Test" signal, much like you have on the Gain-Phase side of an Impedance meter like the HP 4194.
 
  • #7
berkeman said:
Where did you see a PDF file mentioned in his response?


I posted the pdf ...
 

1. What is a low resonance piezo electric driver?

A low resonance piezo electric driver is a device that generates electrical signals to drive piezoelectric materials, which can then convert the signals into mechanical vibrations. These drivers have a lower resonance frequency compared to other types of drivers, making them ideal for certain applications.

2. How does a low resonance piezo electric driver work?

A low resonance piezo electric driver works by applying an alternating voltage to the piezoelectric material, which causes it to expand and contract at a high frequency. This mechanical vibration can then be used for various purposes, such as in ultrasonic cleaners or medical devices.

3. What are the advantages of using a low resonance piezo electric driver?

There are several advantages to using a low resonance piezo electric driver. These include its ability to produce high-frequency vibrations, its compact size, and its low power consumption. It also has a wide frequency response and can operate at high temperatures.

4. Do I have to make a low resonance piezo electric driver?

No, you do not have to make a low resonance piezo electric driver. You can purchase one from various manufacturers or suppliers. However, if you have specific requirements or need a custom design, you may need to make one or consult with a specialist.

5. What are some common applications of low resonance piezo electric drivers?

Low resonance piezo electric drivers are commonly used in various industrial, medical, and consumer applications. These include ultrasonic cleaning, precision positioning, ultrasonic welding, medical imaging, and even musical instruments. They are also used in scientific research for experiments involving vibration and acoustic waves.

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