All I have are my ears to back me up on this but I may as well let you all know this information I have acuired over a long period of time of just listening. No sense leaving you all in the dark about it. I may as well enlighten all of you.
TOILETS GENERALLY FLUSH IN THE KEY OF F
THE STANDARD MICROWAVE WHILE COOKING SOMETHING WILL RUN BETWEEN THE KEYS OF Eb AND F
YOUR AVERAGE FREEZER WILL RUN ON A PERFECT FIFTH (two tones at once) IN THE KEYS OF Bb (for the lower note) AND Eb (for the higher note)
A TRUCK THAT IS PASSING YOU ON THE OTHER SIDE OF THE HIGHWAY WILL START AT A PITCH OF F# BUT AS IT PASSES YOU THE TONE WILL DIMINISH TO A LOWER C#
I hope you learned something from this semi informative post even though you’ll probably never need to know this information ever in your life.