calculate SPL-Third octave using poctave function

2020 6 24
2 个回答
更新时间：2021 3 17
11 次查看（30 天）

0 个投票

I want to calculate the sound pressure level third ooctave using poctave function
I used poctave function to convert pressure data (p) (time,pressure) to 1/3 octave spectrum
[P3rd, cf] = poctave(p,fs,'FrequencyLimits',[df,fs/2],'BandsPerOctave',3);
In order to calculate the SPL-1/3 Octave (sploct)
sploct = 10*log10(P3rd/pref^2);
Is the equation for calculating SPL-1/3 octave is correct or not?

请先登录，再回答此问题。

回答（2 个）

zein
zein 2021-3-5
编辑：zein 2021-3-5

1 个投票

%using filtbank dunction (download it from lib.)
[splfiltb,fcfiltb] = filtbank(p,fs,[],'extended');
%using poctave fun
pref=2e-5;
[P3rd, fc1] = poctave(p,fs,'FrequencyLimits',[3,fs/2],'BandsPerOctave',3);
sploct1
= 10*log10(P3rd/pref^2);
I have used both these two methods (filtbank and poctave fun) and they showed the same resultsm check them

5 个评论
显示 3更早的评论 隐藏 3更早的评论

hello zein, What is the input of p in function poctave??
zein
zein 2021-3-7
p is the pressure signal
can you send me these file which you have tested, pls?
you can send me to Email: hoangngocquygtvtk52@gmail.com
thank you verry much

请先登录，再进行评论。

0 个投票

do you have the answer? I am also interested in this question

类别

在 帮助中心 和 File Exchange 中查找有关 Octave 的更多信息

标签

提问:

zein
zein
2020-6-24

评论：

zein
zein
2021-3-17

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by