Click in the beginning and end of pure tone
12 ビュー (過去 30 日間)
古いコメントを表示
I am wondering why there is a kind of clicking sound in the beginning
but especially in the end of a pure tone.
What I am doing:
spl_rms = 60;
spl_p0 = 20e-6;
spl_max = spl_p0 * 10^(60/20) * sqrt(2);
fs = 20000;
fsig = 1000;
n = 0:1*fs - 1;
t = n/fs;
sig = spl_max*sin(2*pi*fsig*t);
sound(sig, fs);
What is the reason for this clicking sound in the end?
What can I do against it, so how can I modify `sig` to improve this?
2 件のコメント
Rik
2023 年 5 月 15 日
I don't see any reason why that would be the case. Are you sure the problem is in Matlab and not your audio device?
You could try to add a low amplitude signal (essentially 0) at the end of sig, to see whether the click is at the end of any sound() call, or whether is is in your signal.
採用された回答
Les Beckham
2023 年 5 月 15 日
編集済み: Les Beckham
2023 年 5 月 15 日
Try adding ramps at the beginning and end to avoid the discontinuities of starting and stopping the tone.
spl_rms = 60;
spl_p0 = 20e-6;
spl_max = spl_p0 * 10^(60/20) * sqrt(2);
fs = 20000;
fsig = 1000;
n = 0:1*fs - 1;
t = n/fs;
sig = spl_max*sin(2*pi*fsig*t);
ramp = linspace(0, 1, 200);
sig(1:200) = sig(1:200) .* ramp;
sig(end-199:end) = sig(end-199:end) .* flip(ramp);
tiledlayout('Horizontal', 'TileSpacing', 'compact')
nexttile
plot(sig)
xlim([1 500])
grid on
nexttile
plot(sig)
xlim([19500 20000])
grid on
% sound(sig, fs);
4 件のコメント
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Audio I/O and Waveform Generation についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!