A weighting is used for noise and general sound level measurements, emulating the ear sensitivity. It is useful when you want to show a single figure, not spectral data. Flat (no weighting) should be used for speaker analysis.
Post Your Frequency Response Curve!
- Thread starter Ron Resnick
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A weighting is used for noise and general sound level measurements, emulating the ear sensitivity. It is useful when you want to show a single figure, not spectral data. Flat (no weighting) should be used for speaker analysis.
Very crude, using iPhone 13, just placing the phone in front of my face and leaning back so it is “about” where my head is. I think I am using the same pink noise track MikeL identified. I have some others off Stereophile test CDs.
A weighting:
And Flat weighting:
Whats that mean? (Besides a broad dip ~100 hz)
A weighting:
And Flat weighting:
Whats that mean? (Besides a broad dip ~100 hz)
Okay. I will go back to flat as the suggested parameter in the opening post of this thread.
You and Blue58 can argue it out.
Blue58: Why do you think we should use A weighting?
Thanks, Bob! Which speaker is this?
I think this looks very good!
Are you hearing any tinge of brightness around 4 kilohertz?
Congratulations! According to WBF "measurements" your system apparently has much better bass extention than Mike Lavigne system. ...
Micro,
I look forward to the progress in your increasingly serious focus on inserting toothpicks into a cake that couldn't be anywhere near done more and more every day.
That is to say the frequency of your responses have upheld high standards at risk of slipping.
I look forward to the progress in your increasingly serious focus on inserting toothpicks into a cake that couldn't be anywhere near done more and more every day.
That is to say the frequency of your responses have upheld high standards at risk of slipping.
My ears are not that well calibrated Ron, I hear music.
Speakers in this instance are Alsyvox Botticelli X.
If I move way up towards the speaker the slight dip ~100hz flattens out but not a realistic listening position. Within a couple feet forward or back not much changes.
Speed of sound is about 343m/s so a 100Hz dip is about 3.43m = 11.25 feet. Do you have walls that are 11.25 feet apart or maybe that’s the floor to ceiling distance?
But yeah, sometimes, we just have to accept that there is a cancellation because we can’t position ourselves to cancel the dip and we can’t change the physical dimensions of the room.
Fantastic measurements regardless in a real room.
I don’t know. I think most people use 100dB scale because 40dB scale would always look horrible in real systems without DSP (and maybe even with DSP).
I used to think that the slope should always be shallow but a return to the concert hall recently changed my mind. If I’m listening to a symphony in front row seats, the bass-treble balance would sound quite different than listening in the best seat in the balcony. I wouldn’t say either seat is “wrong”. And if one prefers one seat over another, both are legitimate.
Now at home, to replicate that sound, if you have a flatter frequency response (shallower slope), you would have to crank up the volume much higher but if you want to replicate the same bass-treble balance but listen at a lower volume, you would need a steeper slope because of the Fletcher Munson curves.
So to me, all the slopes are legitimate if the owner is happy with the sound and bass-treble balance at the volume they normally listen at.
I also doubt the distance between speaker and microphone matters because almost all of us are measuring at our listening position. I guess if we are just trying to measure the speaker and not what we are hearing, the distance would matter a lot.
Ultimately, I think the exercise is helpful because it helps us see if there are specific dips and troughs that we may be able to improve upon in the bass region, and for those who want more low bass, it shows us whether we might want to add subwoofers to round out the 20-40Hz. It also shows the difference between say my untreated asymmetric room vs a dedicated treated symmetric room frequency response.
I’m definitely no expert but as I understand it Flat is the speaker output but no longer used (Z weighting is the new term). A weighting is similar to what we actually hear. C weighting normally used for above 100dB measurements.
Any acousticians out there please correct my understanding if I’m not ‘getting it’.
edit; forgot to say, Flat is great for analysing actual speaker output while A is better for telling us where we May adjust something in our systems. Don’t get the two mixed up and try for a flat target curve within A weighted result.
cheers
Blue58
Apologies for not doing the Apple thing, but here are my OmniMic charts -
Full range, 1/6th smoothing
Just the low end, no smoothing
Full range, 1/6th smoothing
Just the low end, no smoothing
The typical scale for sharing responeses like these are 50dB scale on the y-axis, so for instance 50-100dB. Also looks like your SPL level isn't calibrated, not that it matters too much just to see the smoothness of the response.
Here is mine measured with the iPad about 3.6m from the speakers (listening position) - interested in your thoughts in particular the increase around 15k…
You need more bass .
Could possibly be the tweeter breaking up already , but if you dont hear it it should be fine .
People were always complaining about the old focal tweeter break up , but in the wilson designs for example i think i like it more so far then the new soft dome .
Ps . Small guess are we talking 2 way system consisting of a 6 inch mid and a hard dome ( metal ) tweeter here ??
Could possibly be the tweeter breaking up already , but if you dont hear it it should be fine .
People were always complaining about the old focal tweeter break up , but in the wilson designs for example i think i like it more so far then the new soft dome .
Ps . Small guess are we talking 2 way system consisting of a 6 inch mid and a hard dome ( metal ) tweeter here ??
Alsyvox speakersYou need more bass .
Could possibly be the tweeter breaking up already , but if you dont hear it it should be fine .
People were always complaining about the old focal tweeter break up , but in the wilson designs for example i think i like it more so far then the new soft dome .
Ps . Small guess are we talking 2 way system consisting of a 6 inch mid and a hard dome ( metal ) tweeter here ??
May be you can improve your bass somewhat by placing the speakers closer to a corner / walls
There are many dipole experts on this forum , may be they can chim in
Lovely speakers! The best way to fill in that low end would be to add a couple subs (80 Hz XO).
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