John Sayers' Recording Studio Design Forum Archive

Hello, I've been reading the R+D Manual an most of it seem logical and understandable but I've got a few questions.

If measuring with high gate time and without smoothing, it seems that you will recieve a very un-even freq response, I recieved two possible explanations for this which I don't know is valid, could you help me out?

IF measuring speakers + room reflections is intended, is this info provided in the test result of any importance without any kind of smoothing applied to the test? from what I understood(might be wrong) it could be the scenario that the human brain filters out those dips/peaks to a even freq response by itself, which makes those extremely detailed measurements useless? If that's the case, what would be a similar R+D smoothing to the human brain?

I just don't understand if they intend to measure speaker direct response or speaker + room response together, which would require different approaches.

Hope it's understandable!
Thank you
/Ossian

I measure low frequencies (below about 300 Hz) at high resolution because that's The Truth and you need to know the true response. At mid and high frequencies it's better to use third-octave averaging. Beware of people who claim our ears / brain can't hear finer than 1/3 octave because that's not true:

Audibility of Narrow-Band EQ

This next article is about something else, but I link it here because it shows how drastically the response can change over very small distances even at very low frequencies:

A common-sense explanation of audiophile beliefs

--Ethan