Interesting data, thanks.
I see a blast furnace as a tube, one end open, one end closed, with high pressure air injected at the closed end: an organ pipe (or a flute)


the analogy is evident.
It will definitely produce sound, at an easy to calculate frequency.
A 20 meter )(60 something feet) long pipe will produce very high power 4.29Hz, go figure.
Chest pounding indeed.
I was *smashed* by the power involved: an Austrian blast furnace used 8.4 MEGA watt blowers, an old 1919 US one used eight 2000kW steam powered ones.
At the same time, the very low frequency/long wavelength (40 meters) makes it very hard for human ears , separated by mere 30 cm/1 ft or so, to pinpoint source.
I see a blast furnace as a tube, one end open, one end closed, with high pressure air injected at the closed end: an organ pipe (or a flute)


the analogy is evident.
It will definitely produce sound, at an easy to calculate frequency.
A 20 meter )(60 something feet) long pipe will produce very high power 4.29Hz, go figure.
Chest pounding indeed.
I was *smashed* by the power involved: an Austrian blast furnace used 8.4 MEGA watt blowers, an old 1919 US one used eight 2000kW steam powered ones.
At the same time, the very low frequency/long wavelength (40 meters) makes it very hard for human ears , separated by mere 30 cm/1 ft or so, to pinpoint source.