(01-25-2014, 05:46 AM)Alta Wrote: [ -> ] (06-11-2013, 12:07 PM)Alta Wrote: [ -> ]ok I got one of the X-mini II speakers but when I run the audio test there is some interference audible after 20 seconds or so. It's not static, just sounds like tuning in a radio receiver, an up and down wavy pattern.
Shannon, any thoughts on the above? I have recently invested in some better quality speakers (Creative Gigaworks T20, rated 20Khz) and I've noticed the following:
The pulsing, "tuning in a radio" sound comes in at around 8 seconds.
It is audible in the right speaker only.
It increases with increasing treble. Setting treble to minimum reduces it, but it's still there.
At full volume I can hear a squiggly digital sound from the left speaker (imagine a 1980s film of a computer processing something - that type of sound).
I hear these sounds when using my laptop to play the speaker test as well (through the internal laptop speakers, the Gigworks and x-mini capsule speakers - all of which reproduce the ultrasonics well - no static).
When playing an ultrasonic track at full volume I hear absolute silence with the Gigaworks speakers.
So are these sounds just artifacts of the speaker test and not an indication of sub-standard speakers?
This happens because some part of the process in expressing the audio from being an electrical signal is unstable. In other words, the speakers fail.
(03-26-2016, 10:15 AM)kratosincarnate Wrote: [ -> ] (03-14-2010, 04:38 AM)Shannon Wrote: [ -> ]What you purchased, unfortunately, is not standard. I'll explain why.
Basics: Hz stands for Herts, which was a man's name, and which has now been applied to the concept of one cycle per second. So to say a frequency response range for a speaker is 180 Hz to 18 kHz means that the speaker won't start producing sound until it is given a signal that would equate to 180 vibrations per second. The lowest a typical human can hear is 22 Hz, and the lowest standard CD recording and playback frequency is 20 Hz. On the other end, you have your speaker working at a top end of 18 kHz, which is 18,000 cycles per second. Well above what a typical person can make out, but fully 2,000 Hertz below top end hearing and CD recording and playback upper limit. CD format standard is 20 Hz to 20 kHz. Anything but the cheapest speakers will follow this standard, and if what you bought wasn't correspondingly cheap in price, then you got ripped off.
In effect, what you have purchased is sub-standard speakers that were produced sub-standard to even the basic standard CD format specifications, no doubt because most people don't know what that stuff means and can't typically tell the difference anyway. However, our ultrasonic subliminals have a frequency range of 14.5 kHz to 20 kHz, so by limiting the upper band to 18 kHz, you don't cut out all of it, but you do distort it somewhat. It would be about like listening to ocean surf without any treble... it is still recognizable as ocean surf, but will sound off somehow.
Now given that you are dealing with ultrasonics and your system specs (I presume for the laptop) max out at 18 kHz (surprising and disappointing, to be sure - they cut corners everywhere they can these days to make an extra buck I guess), getting better speakers probably will not help unless you are stating that your built-in speakers max out at 18 kHz. If the speakers built in max out at 18 kHz, you should still be able to play 18-20 kHz sounds on standard speakers. In that case, I would either just use the ocean surf, or return your speakers and get some that are designed to at least standard spec for CD playback.
You can probably get results out of such speakers, but we go to great lengths to preserve those parts of the program above 12.5 kHz in pitch because that's where the subliminal audio is in an ultrasonic. So probably is the best I can say - I offer no certainty of success when these programs are played on non-standard speakers with non-standard frequency response ranges.
Just answer one question Shannon
i am using AM 6.0 ultrasonic tracks through samsung s advance mobile phone speakers is it ok??
as far as tab is concerned i have a mi pad 1 should i use it or start playing wave and trickling tracks using my earphones which is sondmagic es 18 noise cancellation in ear phones for maximum effect
I use subs on my cell phone all the time. It's mono, instead of stereo, which means it will take longer to produce the same impact, but it works. If you're willing to lose the full impact.
You don't want noise cancellation. Turn that off if you can, or use something without it.