3 Mar
2005
3 Mar
'05
8:47 a.m.
Hello,
I'm looking for the 'official' (ANSI/IEC/ITU/???) specs for the set of
1/3 octave bandpass filters used for sound analysis. ISTR there are
different grades, depending on precision and filter order. If someone
would have them (or a pointer) please drop me line.
TIA,
--
Fons
3 Mar
3 Mar
10:34 a.m.
Hi Fons,
I had a copy of the spec at one time, but I cant find it, I do still have
the formular for calculating the band centres though:
freq = 25 x 10^(band/10)
with band in [0,29]
I can probably find it again when I get back to work next week.
- Steve
On Thu, Mar 03, 2005 at 01:47:26 +0100, Alfons Adriaensen wrote:
Hello,
I'm looking for the 'official' (ANSI/IEC/ITU/???) specs for the set of
1/3 octave bandpass filters used for sound analysis. ISTR there are
different grades, depending on precision and filter order. If someone
would have them (or a pointer) please drop me line.
TIA,
--
Fons
11:12 a.m.
On Thu, Mar 03, 2005 at 02:34:17PM +0000, Steve Harris wrote:
Hi Steve,
I had a copy of the spec at one time, but I cant find
it, I do still have
the formular for calculating the band centres though:
freq = 25 x 10^(band/10)
with band in [0,29]
I've been able to recite them even when drunk for the
last 25 years or so :-)
What I need is the eact requirements on the filter shapes.
IIRC there are even conflicting specs for these from ANSI and IEC.
I can probably find it again when I get back to work
next week.
That would be great. Thanks a lot.
--
FA
7264
days inactive
7264
days old
linux-audio-dev@lists.linuxaudio.org
2 comments
2 participants
participants (2)
-
Alfons Adriaensen -
Steve Harris