SAV-A-LIFE Deer Alert®, a device for the protection
of wildlife, was tested for effectiveness in March 1981
at the Institute of Applied Physics of the Technical
University Vienna. The required frequency ranges as
well as sound intensities were checked in a number of
trails and were confirmed in a Certificate.
far as practical results were concerned, the evidence
showed that not a single accident involving wildlife
had occurred whenever the device was used.
Finnish Experimental Institute for Forestry and Agriculture,
in Rhvenjari, Finland, has tested the device from a
practical standpoint, as to its effectiveness with live
findings confirmed in practical tests the effectiveness
already proven in theoretical trials:
experiments, performed during the period June 20 to
August 17, 1981, were designed to establish clearly
how wildlife (ranging freely over most of Finland’s
territory) as well as domestic animals and certain types
of large-size game reacted to the SAV-A-LIFE Deer
In particular, the reaction of the animals to the various
tones produced by the variable air pressure was investigated.”
test methods involved three different approaches:
Mounting the device on a passenger automobile, a Volvo DLm/80.
Generating various frequencies by blowing by mouth.
Generating frequencies by means of a compressed-air
Animals used as test subjects.
animals were used in the tests:
(including Carelian bear hounds, Finnish and Swedish
spitzes, mongrel dogs, Scottish shepherds, German shepherds,
English Sheepdogs, Chinese shih tzu, and Rottweilers );
cattle; European bison, sheep, horses, camels, deer
and elk, both roaming freely and in captivity, European
fallow deer, chamois, reindeer, wolves, bears (zodiac,
Malay and Finnish brown bears), and bats.
tests on animals in captivity were performed in Helsinki’s
Korkeasaar Zoological Garden or in the Evon Testing
was taken in all tests to ensure that the animals were
not disturbed by the approach itself, but only by the
whistle tone alone. In particular, observation centered
on the position of the ears, which in most animals were
immediately oriented in the direction of the ultrasound.
Before the main body of the trails was undertaken, the
effect was tested on dogs, since they displayed the
most reliable reaction in the experiments.
the animals had gotten used to the presence of the testers,
the trials themselves were begun, using the various
methods (blowing by mouth and with compressed air).
so doing, the frequency was varied continuously (from
a soft tone to tones no longer perceivable by the human
ear), as was the distance from the test subjects.
tests evidenced clear-cut reactions from all animals,
except cattle, sheep and camels.
fastest reaction was displayed by wild animals. Elk
and deer proved that freely roaming animals react more
quickly than the same animal in captivity (conditioning
effect of ambient noise in the same frequency-range).
vehicle tests at speeds of 35mph (60 kms/hr) dogs in
particular reacted sharply to the approach of the test
the duration of the tests was found to be too short,
it could already be determined that the frequencies
of the SAV-A-LIFE Deer Whistle represented an acoustically
disturbing factor for the various animals, causing an
obvious reaction. In a number of cases, the tones generated
by the device obviously stopped the animals in their
that case, the animal’s ears would be turned sharply
in the direction of the whistle tone. Animals that were
about to cross the road would stop in their motion.
SAV-A-LIFE INDUSTRIES, LTD, New York, NY