Dazer II stops barking dogs - safely and quietly.
DAZER II produces an ultrasonic output that is 115 dB at 0.5 meter reference and is harmless to barking dogs and training dogs. The sound pressure level is well below the threshold levels for pain for dogs. This frequency range is at 25 + or - 2 KHz; humans can hear to about 14 KHz, dogs as high as 40 KHz.
The benefit is to provide a startle effect, or called an alpha wave interruption — like when a human hears a smoke alarm — their hearing is not affected. The dog's reaction to the sound from the Dazer II device is like an alert to the sound and therefore being deterred from the source of where the sound is emitting.