Ne drži. Visokofrekvenčne piščalke so splošno uporabne na severu kjer je veliko jelenov in losov in dejansko delujejo - preizkušeno na lastnem avtu - nobenega losa nismo videli, dokler je nisem snel.
Uporabljene že... tudi jaz sem jih imel pred 20 leti namontirane na takratnem avtu, sedaj jih pa že 20 let nimam, me je pa pred srčenjem z srno
predvsem obvarovalo to, da sem na območju kjer so, vozil počasneje, bil bolj pozoren, več gledal levo desno in upočasnil ko sem jih zaznal,
na ta način sem rešil že nekaj divjadi in sebe.
They're hyped as a great way to help drivers on roads, but how effective are deer whistles to avoid vehicle collisions and do they really work?
www.deeranddeerhunting.com
Discouraging Results
Based upon the observed response of 319 deer, the researchers concluded the pure tones did not alter deer behavior in such a way as to prevent deer-vehicle collisions. In other words, the simulated sounds of deer whistles were no more effective than no sound at all.
Overall, 54 percent to 71 percent of the observations were classified as neutral, meaning more than half the time deer did not alter their behavior in response to the test vehicle. Only the lowest frequency tested (.28 kHz) produced a significant response. And that was unfavorable, because deer were more likely to enter the roadway in response to the treatment.
Unlike some deer whistles, all sound frequencies tested were known to be audible to deer. Therefore, given the lack of deer response, the investigators suggest the following:
1. Deer may have too little time to react as desired.
2. Deer may lack the neurological ability to process the alarm information efficiently to respond as desired, or
3. Deer might not recognize the sounds as threatening.
Po mojem mnenju so tiste piščalke premalo učinkovit, saj je po mojem več ovir da bi lahko dovolj učinkovito delovale,
bi jih smatral za učinkovite če bi delovale preko zraka na kompresor in imele s tem res dovolj jakosti, itd...