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Old 2021-02-18, 00:40   #4
storm5510
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Aug 2009

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Thank you both for your replies.

I intend to open it and check everything. It is overdue for a cleaning.

Resonance: My father, being hard of hearing, began turning up the volume on his TV after my mother passed away. I was in his front yard one summer day and I heard something which sounded like morse-code. The source was one of the large windows on the side of his house. I went in, and without saying anything, I lightly touched the same window from the inside on a corner. It would vibrate at a certain sound frequency when he had his TV turned on. Above, or below, nothing. It did this in rapid, but varying, intervals. I was rather amazed.
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