wavrecord() replacement and sound speed measurement
4 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Michal Rocinski
le 27 Avr 2020
Commenté : Walter Roberson
le 21 Sep 2023
I would like to try to measure sound speed with Matlab. I have two microphones recording sound at the same time. They are both connected to my laptop through stereo input. I have tried to use code from this topic: https://www.mathworks.com/matlabcentral/answers/129171-sound-speed-measurement-with-two-microphones
I replaced 'wavrecord()' to an audiorecorder function but it gives an error. I have no idea what I can change to make the program work properly and start recording a sound.
Here is the code and the error below:
if true
clear; figure; grid on; hold on;
Fs = 22050;
r = audiorecorder(22050,16,2);
record(r,5);
mySpeech = getaudiodata(r, 'int16');
tmax = length(mySpeech)/Fs;
t = linspace(0, tmax, 5*Fs);
plot(t*1000,mySpeech);
axis([0 tmax*1000 -2 2]);
xlabel('time (ms)');
j = 1;
for i=1:length(mySpeech)
if mySpeech(i)>0.15
pick(j) = 1000*i/Fs;
fprintf('%3d --> %8.1f ms\n',j, pick(j));
j=j+1;
end
end
end
Error using audiorecorder/getaudiodata (line 765)
Recorder is empty.
Error in program (line 7)
mySpeech = getaudiodata(r, 'int16');
0 commentaires
Réponse acceptée
Plus de réponses (1)
Dian
le 21 Sep 2023
Modifié(e) : Walter Roberson
le 21 Sep 2023
clear all;
Fs = 8000;
y = wavrecord(5.0*Fs, Fs, 'double');
wavwrite(y,Fs,'aiueo.wav')
y1=wavread('aiueo.wav');
t=length(y1);
y2=y1(1:10000);
plot(y2)
1 commentaire
Walter Roberson
le 21 Sep 2023
Unfortunately, that will not solve @Michal Rocinski's problem, which was happening in R2019b. By R2019b, wavrecord() had been completely removed from MATLAB; wavwrite() had also been removed https://www.mathworks.com/matlabcentral/answers/647743-is-wavwrite-still-used#answer_544418 and probably wavread() had been removed too.
Voir également
Catégories
En savoir plus sur Audio and Video Data dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!