Several years ago I investigated much time to understand the fundamental principles how to control the directivity of a loudspeaker. I made research using ABEC and some prototypes. The document was written in German so it was limited to a small number of readers compared to world's population. I now translated it to english so that anyone can read it. Please tell me if the translation has any mistakes or is hard to understand.
I hope the document may be helpful.
Manipulating Directivity
I hope the document may be helpful.
Manipulating Directivity
Last edited:
Thank you!
Yes, it is linear phase.
Creating a linear-phase filter is not that easy in ABEC (I guess it is the same in AKABAK). The curve file shall not contain any phase information. To create such a curve file I did the following in the past (maybe there is an easier way today):
- Create a FIR filter with RePhase and export it as WAV
- Import the WAV in to VACS
- Fourier transform it to get the frequency domain (Processing -> Fourier response)
- Normalize it to "curve max amplitude"
- Export it as curve file (F7) with amplitude only
Then use that in ABEC/AKABAK as curve file and you have your linear-phase filter.
I’ve just discovered your work, thanks to a lead by @vineethkumar01
Thank you for sharing your work.
The rest of your website is very informative. For those articles in German, with machine learning today there are some apps that can translate your excellent articles to any language of one’s choosing.
Thank you for sharing your work.
The rest of your website is very informative. For those articles in German, with machine learning today there are some apps that can translate your excellent articles to any language of one’s choosing.