File:Virtual Microphone Animation.gif
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Virtual_Microphone_Animation.gif (512 × 512 pixels, file size: 3.22 MB, MIME type: image/gif, looped, 241 frames, 9.6 s)
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Summary
| Description |
English: A transition between different horizontal virtual microphones derived from a B-format input.
Gnuplot source (created by Jörn Nettingsmeier, CC-BY-SA 3.0 + GFDL) set terminal pngcairo font "/usr/share/fonts/truetype/LiberationMono.ttf,8" size 512,512
set size square
set polar
set style line 11 lc rgb 'gray80' lt 1 lw 1
set style line 1 lc rgb 'red' lw 3 lt 1
set style line 2 lc rgb 'blue' lw 3 lt 1
set grid polar ls 11
unset border
unset raxis
unset xtics
unset ytics
unset key
set rrange[0:1.1]
set rtics ("" 1, "" 1/sqrt(2), "" .5, "" .5/sqrt(2), "" .25, "" .25/sqrt(2), "" .125)
set label 42 '0°' center at first 0, first 1.06
set label 43 '180°' center at first 0, first -1.06
set label 44 '90°' right at first -1.06, 0
set label 45 '270°' left at first 1.06, 0
set for [i=0:6] label (46+i) right at first 0.08, first (1/sqrt(2)**i) sprintf("%2d dB", i*-3.0)
W(t)=1/sqrt(2)
X(t)=sin(t) # hack to turn 0° axis upwards
Y(t)=-cos(t) # dto.
#free-field normalised parametric microphone:
#gain functions for WXY:
GW(p) = p * sqrt(2)
GX(T,p) = (1.0-p)*cos(T)
GY(T,p) = (1.0-p)*sin(T)
card(t,T,p)= GW(p)*W(t) + GX(T,p)*X(t) + GY(T,p)*Y(t)
#workaround to map negative r to positive but with blue color:
pcard(t,T,p) = card(t,T,p)>0 ? card(t,T,p) : 0
ncard(t,T,p) = card(t,T,p)>0 ? 0 : abs(card(t,T,p))
T=0 # point north!
p=1.0
frame=0
do for[a=0.0:47.0] {
set output sprintf("polar-%03d.png",frame)
frame=frame+1
set label 1 left at first .62, first 1.08 sprintf("Theta: %3.1f°", (T*180.0/pi))
set label 2 right at first 1.05, first 1.01 sprintf("Pattern: %1.6f", p)
set label 3 right at first 1.05, first .91 sprintf("W: %1.6f", GW(p))
set label 4 right at first 1.05, first .84 sprintf("X: %1.6f", GX(T,p))
set label 5 right at first 1.05, first .77 sprintf("Y: %1.6f", GY(T,p))
plot pcard(t,T,p) ls 1, ncard(t,T,p) ls 2
p=p-1/72.0
}
do for[a=0.0:47.0] {
set output sprintf("polar-%03d.png",frame)
frame=frame+1
set label 1 left at first .62, first 1.08 sprintf("Theta: %3.1f°", (T*180.0/pi))
set label 2 right at first 1.05, first 1.01 sprintf("Pattern: %1.6f", p)
set label 3 right at first 1.05, first .91 sprintf("W: %1.6f", GW(p))
set label 4 right at first 1.05, first .84 sprintf("X: %1.6f", GX(T,p))
set label 5 right at first 1.05, first .77 sprintf("Y: %1.6f", GY(T,p))
plot pcard(t,T,p) ls 1, ncard(t,T,p) ls 2
T=T-(pi/96.0)
}
do for[a=0.0:47.0] {
set output sprintf("polar-%03d.png",frame)
frame=frame+1
set label 1 left at first .62, first 1.08 sprintf("Theta: %3.1f°", (T*180.0/pi))
set label 2 right at first 1.05, first 1.01 sprintf("Pattern: %1.6f", p)
set label 3 right at first 1.05, first .91 sprintf("W: %1.6f", GW(p))
set label 4 right at first 1.05, first .84 sprintf("X: %1.6f", GX(T,p))
set label 5 right at first 1.05, first .77 sprintf("Y: %1.6f", GY(T,p))
plot pcard(t,T,p) ls 1, ncard(t,T,p) ls 2
p=p-1.0/144.0
}
do for[a=0.0:96.0] {
set output sprintf("polar-%03d.png",frame)
frame=frame+1
set label 1 left at first .62, first 1.08 sprintf("Theta: %3.1f°", (T*180.0/pi))
set label 2 right at first 1.05, first 1.01 sprintf("Pattern: %1.6f", p)
set label 3 right at first 1.05, first .91 sprintf("W: %1.6f", GW(p))
set label 4 right at first 1.05, first .84 sprintf("X: %1.6f", GX(T,p))
set label 5 right at first 1.05, first .77 sprintf("Y: %1.6f", GY(T,p))
plot pcard(t,T,p) ls 1, ncard(t,T,p) ls 2
p=p+1.0/96.0
T=T-(1.5*pi/96.0)
}
set output
|
| Date | |
| Source | A series of gnuplot images rendered into a GIF animation |
| Author | Nettings |
Licensing
Nettings at English Wikipedia, the copyright holder of this work, hereby publishes it under the following licenses:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Nettings at English Wikipedia
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2013-12-28 16:05 | 512×512× (3373507 bytes) | Nettings | set loopcount to infinite. not obnoxious since the thumb is a still. |
| 2013-12-28 15:10 | 512×512× (3373507 bytes) | Nettings | remove spurious last frame |
| 2013-12-28 15:00 | 512×512× (3392296 bytes) | Nettings | Uploading a self-made file using [[Wikipedia:File_Upload_Wizard|File Upload Wizard]] |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:03, 22 May 2015 | | 512 × 512 (3.22 MB) | Clusternote | Transferred from en.wikipedia |
File usage
The following page uses this file:
Global file usage
The following other wikis use this file:
- Usage on ca.wikipedia.org
