Както споменах преди малко в twitter след малко игра с equlizer-a на VLC успях до някаква степен да филтрирам досадния жужащ звук на вувузелите. След малко research в Google намерих едно проучване на South African Medical Journal, в което има следното:
The initial report (1) provided the maximum instantaneous A-weighted sound pressure level (Lmax Fast [dBA]) averaged for 2 recordings during single vuvuzela blasts at 4 distances from the bell of the vuvuzela. This method is in agreement with the recommendation by the World Health Organization (2) for measuring individual sound events. A-weighting was used for all measurements to compensate for the non-linear sensitivity of the human ear, which is differentially sensitive to sound across the frequency spectrum (least sensitive at very high and very low frequencies). A breakdown of the average intensities at individual frequencies across the frequency spectrum is provided in Table I. A characteristically flat frequency spectrum was evident between 250 and 8 000 Hz. The average intensity difference between the individual frequency measurements (Table I) of the 2 recordings at each of the 4 respective distances from the bell of the vuvuzela was 0.6 dB ([ or -]3.2 dB standard deviation)
И за прегледност има и табличка:
Intensity (dBA) Frequency Bell (Hz) At ear opening 1 m 2 m 125 36 62 38 35 250 92 106 82 85 500 103 121 102 101 1 000 106 122 108 100 2 000 101 122 110 101 4 000 97 109 110 102 5 000 93 111 109 100 8 000 87 110 107 98
И така, за тези, които като мен гледат мачовете на стриймове онлайн, а и за тези, които имат equalizer-и на телевизорите си вече има частично решение на проблема с дразнещия звук издаван от вувузелите. Ето как изглежда equalizer-a на моето vlc в момента:
Забележка:
Това безусловно рефлектира и върху коментара на БНТ. Но понеже така или иначе не съм особен фен на Петър Василев и Никола Ибришимов това е приемлив компромис.
Редакция 1:
Подобно нещо, направено с използването на audio филтри в mplayer, или по-точно:
* -af pan command line fix, now outputs the right number of channels
and accepts values < 0 or > 1. Channel order had to be changed.
* -af sinesuppress to remove a sine at a certain frequency
mplayer -af pan=1:0.5:0.5,sinesuppress=233:0.01,sinesuppress=466:0.01,sinesuppress=932:0.01,sinesuppress=1864:0.01,sinesuppress=232:0.01,sinesuppress=465:0.01,sinesuppress=931:0.01,sinesuppress=1863:0.01,sinesuppress=234:0.01,sinesuppress=467:0.01,sinesuppress=933:0.01,sinesuppress=1865:0.01
Евала и хиляди благодарности!
Пейо, пак заповядай :) Трябва да се грижим за здравето си :)
[...] на телевизиите няма да се сетят, но just4nick е намерил начин да го ограничи в vlc, a zakk – прати инструкция за телевизор Samsung. [...]
[...] и прогресивен български композитор Йоан Вувузел. На just4nick има инструкции, как да филтрирате тоя райски звук. [...]
[...] This post was mentioned on Twitter by Dimitar Nikolov, Mario Peshev. Mario Peshev said: Как да махнем жуженето и да намалим коментарите при стриймване с VLC – http://just4nick.net/blog/archives/831 #fb [...]
What do you think of the vuvuzela problem?
Someone please stop the horns! I tried to give the World Cup a chance, but I’d even turn off the Superbowl if there was the same annoying background noise.
The Vuvuzela, just when you though kazoos were the most annoying „musical instruments“
@WM Vuvuzela73, I have nothing against the vuvuzelas itself, but the noise is really annoying. As you can see, I tried to filter it.
The vuvuzelas are nerve-racking, I was on the Germany match and the audio that comes from this horns is disheartening. Maybe they should not prohibit them, but at least make it sound a little lower and yes, they do sound like elephants on the stadium.
Hello may I quote some of the material here in this post if I reference you with a link back to your site?
Yes, you can. My posts are under creative commons license (by-nc-sa).