U must mean "the speed of sound" divided by half the FREQUENCY - or otherwise the units don't add up 2 a distance.

Looks 2 me that ur teacher was calculating the speed of sound in air.

Period (ZMAN MACHZOR) = 1 / freq.
Wavelength = distance between 2 peaks (1 cycle).

Speed = distance / time = wavelength / period = wavelength x freq.

>> Speed / wavelength = Freq. >> speed / (0.5 x wavelength) = Freq x 2.

>>Speed / freq. = wavelength >> speed / (0.5 x freq.) = 2 x wavelength (yup, distance) - whatever that means.

Theoretically speaking, increasing the length of a vibrating tube of air and reaching the same resonance freq. would indicate the speed of sound under specific air density.

Capiche?

As 4 the distance the bass needs in order 2 build up - it's true that 4 a good bass response 1 needs the distance, (1 of the reasons ur supa-blsta-pro monitors r useless in ur MAMADs) but I have been mixing 4 half of my life @ less than 6 meters away, no 100Hz tone has ever escaped...

U could b talking about room MODES of resonance, but a good salad needs some lemon, and I don't have any with me @ the moment.

Peace,

Zooot