

i'm telling you, frannie - this too shall pass and once it does there'll be the next disasterit never ends
all you can do is roll with the punches![]()
Rat with rabies??
No no no no no no no no no!!We have the next disaster ready and waiting-------the septic.


Rat with rabies??
morning, stoney!
waiting on the ac guy - one heat pump is showing low pressure with the red light blinking
started my day rather well!![]()
Good morning FranGood morning,StoneI think.........
Booo! for the blinking red lights, Tibs . . . .morning, stoney!
waiting on the ac guy - one heat pump is showing low pressure with the red light blinking
started my day rather well!![]()
Good question....I've seen articles on both sides of that argument. Who to believe??Oh man. Good luck with that Tibs.
(You too Fran)
And CES too. I wonder if those ultrasonic things really repel stuff????????? (and don't bother beasties).
morning, stoney!
waiting on the ac guy - one heat pump is showing low pressure with the red light blinking
started my day rather well!![]()
Look on the bright side Fran. New Deck.
(running away fast now)
What sounds can a rat hear?
Humans can hear sounds from about 16 to 20,000 Hz (20 kHz)*. Anything above 20 kHz is called "ultrasound," because those sounds are higher than we can hear. Anything below 20 Hz is called infrasound -- elephants communicate over miles with low, rumbling infrasound (more).
Rats can hear ultrasound: the range of the rat's hearing is around 200 Hz to 80 or 90 kHz (Fay 1988, Kelly and Masterson 1977, Warfield 1973). There is a whole world of high frequency sound out there that rats can hear that we cannot, a perceptual difference that humans tend to forget (Milligan et al. 1993, Sales et al. 1998).
For example, when a human gently rubs thumb and forfinger together, we hear nothing. But this movement makes a scratchy sound in the ultrasonic range. Wire cages make a lot of ultrasonic noise in addition to audible noise when rats move around in them.
Here are some of the frequency ranges that are perceptible to other species:
Dogs: up to 40,000 Hz
Cats: 100 to 60,000 Hz
Bats: 1,000 to 100,000 Hz
Dolphins: up to 150,000 Hz
Why don't ultrasonic pest repellers work?
Ultrasonic devices do not work because rodents rapidly become accustomed to repeated sounds (a process called habituation). Mice and rats learn that the ultrasound from the pest repeller isn't dangerous, so they gradually get used to it and return to their nesting and feeding areas.