| |
263 Search Results Found |
| 1 |
Forum: Pi Speakers «»
Posted on: Thu, 12 July 2012 22:11 «»
By: Wayne Parham
Helmholtz formula
…
You could calculate the port using standard Helmholtz formula. That will be plenty for a sub, no need to do any more analysis.
Subtract the volume displaced by the driver and wood thickness. Without offset, a 15" x 15" a 15" box is …
|
| 2 |
Forum: Pi Speakers «»
Posted on: Fri, 25 April 2008 11:36 «»
By: Wayne Parham
Helmholtz formula
…
Check out the Helmholtz formula below. You can tune to the same frequency using different port sizes. As port area is increased, port length also has to be increased to tune to the same frequency. When in doubt, measure impedance and look for the …
|
| 3 |
Forum: Speaker «»
Posted on: Mon, 28 March 2005 13:31 «»
By: Wayne Parham
Helmholtz resonator
Add a Helmholtz resonator, which is just a chamber hanging off the side of the duct. That will form an acoustic band-stop filter, which you can set to the offending frequency by the dimensions of the chamber and the connecting passage.
|
| 4 |
Forum: Pi Speakers «»
Posted on: Mon, 05 May 2003 22:39 «»
By: Wayne Parham
Helmholtz formula
The Helmholtz frequency is determined by the following formulas:So as you can see from the formulas, if you change the cabinet volume (Ve) and still want the resonant frequency to stay the same, you'll need to change port dimensions.
|
| 5 |
Forum: Pi Speakers «»
Posted on: Tue, 28 August 2001 16:30 «»
By: Wayne Parham
Different Helmholtz frequency
…problems.The flare will tend to raise the Helmholtz frequency. If it's 4" long overall but flared at the end, it will act like it's slightly shorter, which will raise the Helmholtz frequency a little. On some speakers, this might be a problem. It might…
|
| 6 |
Forum: Pi Speakers «»
Posted on: Fri, 16 September 2011 09:41 «»
By: Wayne Parham
Helmholtz frequency of each model
…to me that it might be helpful to list the Helmholtz frequency of each model here for reference. You can high-pass at this frequency to limit excursion where the driver is unloaded. There is very little sound produced below this frequency anyway.
one…
|
| 7 |
Forum: Pro Sound «»
Posted on: Thu, 22 September 2005 12:57 «»
By: Wayne Parham
Pipes, tapered pipes and Helmholtz resonators
…Resonant Frequency, online calculator of Helmholtz resonant frequencyResonance, standing waves, & Eigentones, discussion of resonance and QMusical Acoustics - Some Introductory Pages, several links about matters acoustic from the University of New South …
|
| 8 |
Forum: Speaker «»
Posted on: Thu, 22 September 2005 12:55 «»
By: Wayne Parham
Pipes, tapered pipes and Helmholtz resonators
…Resonant Frequency, online calculator of Helmholtz resonant frequencyResonance, standing waves, & Eigentones, discussion of resonance and QAir Column Acoustics, a description of wave propogation in pipes and conical sectionsMusical Acoustics - Some …
|
| 9 |
Forum: Speaker «»
Posted on: Thu, 22 September 2005 12:54 «»
By: Wayne Parham
Pipes, tapered pipes and Helmholtz resonators
…Resonant Frequency, online calculator of Helmholtz resonant frequencyResonance, standing waves, & Eigentones, discussion of resonance and QAir Column Acoustics, a description of wave propogation in pipes and conical sectionsMusical Acoustics - Some …
|
| 10 |
Forum: Speaker «»
Posted on: Thu, 22 September 2005 12:53 «»
By: Wayne Parham
Pipes, tapered pipes and Helmholtz resonators
…Resonant Frequency, online calculator of Helmholtz resonant frequencyResonance, standing waves, & Eigentones, discussion of resonance and QAir Column Acoustics, a description of wave propogation in pipes and conical sectionsMusical Acoustics - Some …
|
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
