I heard the Worldwide Hum roughly four days after I arrived in Russia. It wasn’t as clear and distinct as it here on the Sunshine Coast in BC. The city of St. Petersburg is dense and highly populated, home to more than five million people. So it didn’t surprise me that my nighttime window for hearing the Hum was smaller than in my small town on the West Coast of Canada. Presumably, the cacophony generated by such a densely populated and busy city would only subside for a few hours during the wee hours of the night. My apartment was on Ulitsa Pravdy, in the downtown core and just a few hundred meters away from the intersection of two big metro lines. The Metro (subway) system starts up early, comprises more than 1400 cars and almost 200 trains moving fast and deep – in one case almost 300 feet beneath street level. The road traffic is fast, intense, and high volume. There is a rich and high volume audio spectrum, down into the infrasonic.
And now the anticipated answer to the question: What perceived frequency did I hear?
I’m sorry but I can’t answer that accurately. I opened up the online tone generator several times, but I couldn’t get a good match like I can here. I am quite confident that it is the same general range (i.e. low 50s Hz to mid-60s Hz).
I know this is disappointing because had I been able to get a good frequency match, it could have sorted out one issue: the electric grid. Russia has a 50 Hz grid, unlike North America, which uses 60 Hz. A difference in perceived Hum tone would have been significant and possibly diagnostic. Had I heard a different frequency, it could have also lent weight to the theory that the Hum is a conglomeration of noise, with each location having unique sonic characteristics, interpreted individually by people’s auditory systems.
Anyway, it’s great to be back.