What measurements are good for bracing and damping?

[tone]

So I’m doing some experiments with adding bracing to my speakers and bitumen.

I don’t have an accelerometer, so I’ve been taking mostly RT60 decay measurements with REW.

And of course some freq response sweeps at the listening spot.

What measurements are best to take to see if there has been a positive result in let’s say adding bracing in my speakers?

Is there an accelerometer I can get to connect to REW?

Btw all these mods i am doing are completely reversible.

Thanks in advance !

[123toid]

@Tone One of the easiest is using DATS V3 and taking an impedance sweep. You will see humps in the impedance indicating resonance. The higher they are the worse the resonance. Obviously if you add bracing and or sound absorption material and the impedance humps disappear or get smaller you know it is working. You can also see if it is affecting your tuning frequency. Just keep in mind some of the resonances might be due to port resonance.

[tone]

Thanks man

Using DATS , are those humps in the impedance sweep pretty evident?

I mean are they better than using an accelerometer ?

I found an accelerometer from Meniscus Audio which I will use with my recording interface into REW

Appreciate the help!

[123toid]

@Tone You can use it this way in order to help you find out where to add mroe bracing. But in general if there are resonances you should be able to see them on your impedance graph.

[tone]

Is that better than an accelerometer?

I used the accelerometer with success, just as an update.

But of course I have to take multiple measurements at different areas of the cabinet

Thanks man. Super appreciate all the help and advice

[123toid]

@Tone I wouldn’t say any way is better, just different ways of getting the same result. Although, an accelerometer probably is more accurate to help locate the resonance.

[tone]

Thanks so much.

You know, you are one of the most kind people that has helped me with this stuff

Super appreciate it

[Author]

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