Measuring A Rooms Lowest Usable Frequency

[OMNIFEX]

Hi.

I'm just curious when measuring a rooms lowest acceptable
frequency, do you measure it by:

Speed Of Sound divided by Frequency divided by Half Wave?

OR

Speed Of Sound divided by Frequency divided by Quarterwave?


OR

Some other method?


Thanks.

[richie00boy]

freq = speed of sound / longest dimension

[BillFitzmaurice]

There is no such thing as a room's 'lowest acceptable frequency', though there are of course resonant modes that will affect response in both a positive and negative fashion. If what you're referring to is the frequency below which cabin gain exists that would be at about a half-wavelength, which is speed of sound divided by longest dimension/2.

[OMNIFEX]

Thanks Guys!

Resonant Modes..... Thats the word I was looking
for


Thanks Again!