Despite moving out, I frequently pop
back to mums house to say hello. This week house I turned up but as
soon as I entered the garden, I was met with the most annoying high
pitch continuous beeping I have ever heard.
When I mentioned it to my mother, she
was adamant that she couldn't hear anything which briefly make me
wonder if I was going insane! Once I was inside it stopped so I soon
forgot about it until mum went into the garden and it started again.
After a little investigating, I was
able to locate the source of the noise. It was a new ultrasonic
animal repellent that mum had put in the garden to try to stop all
the neighbourhood cats coming into her garden.
Mum then burst into laughter saying
that poor Tilly had been complaining all afternoon that her head was
hurting because of the noise and had been hiding the device in random
places. Mum couldn't hear anything and so had just assumed that Tilly
was being silly and kept putting it back.
So I gave mum a science lesson on how
the human ear changes as you grow meaning that the younger you are
the higher pitch you can hear, which was why she couldn't hear it but
Tilly could. I was secretly happy that I could hear it as it meant I
was still young!
I was able to change the settings on
the device to one that repelled cats and not human children (I think
it was actually set to repel bears and large animals, despite the
fact that her house has never been attacked by a bear!!)
Once the noise was no longer giving me
and Tilly a headache, we put it back in the garden and there doesn't
seem to be any cats coming into the garden anymore. But mum has said
that if we annoy her too much she will turn it back up again!
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