Recent content by bobolix

Somehow we don't understand each other. I need to derive the absolute phase response of the driver to include the transport delay of the driver, which is caused, for example, by the diaphragm being shifted to a depth relative to the flange or front wall of the speaker cabinet. From this point of...

I still don't understand. I enclose as an example the measurement of a tweeter at a distance of 500 mm. The time delay that needs to be subtracted to obtain the correct phase response is 1.4534 ms at an air temperature of 20.5 ° C. The initial cumulative shift that is shown is 6.3 microseconds...

When I open the "Offset t = 0" window in the measurement, the non-zero value "Cumulative shift" is displayed, even if the time shift has not been manipulated in any way. These are usually values in the order of some microsecond, which are different for each measurement and have nothing to do...

It would be handy if there was an option of multiplying the data by a number under the trace arithmetic.

BTW, i presume the vector averaging is performed rather on the impulse responses than on the complex frequency resposes - isn't it ?

Concerning the left window zero - it was not set in fact. At the original measurements there was the Left window zero without problems and it was left for averaging, too. (Usually I adapt the left window so that the correct phase response were achieved - a problem with the noise or so.) The...

I tried to reproduce the smoothing effect for the six woofer, without success, all seems to be O.K. :dizzy::doh:. Now I'm really confused. :rolleyesno: .

They are here:

I have another problem with the averaging. Attached are two pictures related to two tweeters averaging, the first beeing created by RMS avg, the second by vector avg. There must be something wrong with the vector averaging definitely, but absolutely I can't get what. Both graphs were creates...

Note nothing similar exists at RMS avg.

Nevertheless, it seems some kind of smoothing applies at the vector averaging. Is it true ?

Thanks and apologizing, I somehow missed it. :rubeyes: REW rulez ! :T

For some purposes, it would be advantageous to be able to display multiple phase responses simultaneously (analogous to All SPL) and their average value, as well as to export the average characteristic including phase information.

This is too cheap objection. Certainly the ear is not a mic, but some connections can be revealed by ear as well as by mic. The excessive reverberation buildup at low frequencis is disturbing and in fact it can even destroy the localisation, what can be used (and misused) at subwoofer...

Your listening room seems to be quite "live". If the volume of the room is 100 cubic meters, then the optimum RT60 is 0.25 s, at 50 m³ it is 0.2 s approx. The electrical correction doesn't solve the problem, as it is valid for only one point in the room. Further, if the loudspeaker response is...