File:Gaussian white noise.ogg
Gaussian_white_noise.ogg (Ogg Vorbis sound file, length 10 s, 71 kbps, file size: 87 KB)
Captions
DescriptionGaussian white noise.ogg | 10 seconds of Gaussian (normally-distributed) white noise with an RMS value of -13.2 dB. | ||
Date | |||
Source |
See Image:White noise.ogg for details on generation and conversion. Instead of rand(), this uses randn(), which generates normally distributed random values centered about 0. So to generate 10 seconds of noise sampled at 48 kHz: gwn=randn(48000*10,1);
The wavwrite() function expects values in [-1.0, 1.0), so, for lack of a better idea, I just normalized the data to this range: gwn=gwn/(max(abs(gwn)));
wavwrite(gwn,48000,16,'white noise normal.wav');
So the normally-distributed version is somewhat quieter than the uniformly-distributed version. (According to SoX, there is an 8.4 dB difference, but it sounds around 4.5 dB.) I can fix this later, but I'll wait until after I've done all the other noise colors to see if it's worth trying to make them all the same RMS amplitude, or if this will require them to be too quiet. The pristine, lossless file is accessible in File history, while the smaller lossy file is the one included in articles. |
||
Author | Omegatron | ||
Permission (Reusing this file) |
I, the copyright holder of this work, hereby publish it under the following licenses: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
You may select the license of your choice. |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 03:51, 21 April 2008 | 10 s (87 KB) | Omegatron (talk | contribs) | Lossy Ogg Vorbis version | |
03:50, 21 April 2008 | 10 s (894 KB) | Omegatron (talk | contribs) | Lossless FLAC-encoded version |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
Transcode status
Update transcode statusFormat | Bitrate | Download | Status | Encode time |
---|---|---|---|---|
MP3 | 123 kbps | Completed 09:17, 9 December 2017 | 0.0 s |
File usage on other wikis
The following other wikis use this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Software used | Xiph.Org libVorbis I 20070622 |
---|