I 'm trying to measure the polar frequency response of a Dolby Atmos soundbar with its wireless subwoofer.
I'm using ARTA software with the microphone at 1.5meters. The input signal goes to the AUX input of the soundbar.
The measured Impulse response is delayed around 90 msec which is normal for such kind of speakers that include wireless connection between sound and subwoofer.
The problem is that sometimes the delay is increased up to 1400 msec for reason that I cannot identify.
To solve this problem, the soundbar has to be turned off and turn on again.
Has anyone seen such a problem? Is there something that causes this problem ?
I'm using ARTA software with the microphone at 1.5meters. The input signal goes to the AUX input of the soundbar.
The measured Impulse response is delayed around 90 msec which is normal for such kind of speakers that include wireless connection between sound and subwoofer.
The problem is that sometimes the delay is increased up to 1400 msec for reason that I cannot identify.
To solve this problem, the soundbar has to be turned off and turn on again.
Has anyone seen such a problem? Is there something that causes this problem ?
Yes, most of the time it's fine.
Also it seems to only happen during measurement, I never noticed such a delay when plays music.
I cannot explain why this happens and was looking for some other opinions.
Also it seems to only happen during measurement, I never noticed such a delay when plays music.
I cannot explain why this happens and was looking for some other opinions.
What's the input signal you're using? I used to run into some systems like this that would go into a low power mode when no signal above a certain level was present for a while. They'd start playing again after getting a signal, but it would take a short amount of time to turn back on after getting a signal. I'm wondering if you're using noise so you don't notice that the start of the signal is missing if this is what's happening?
I have tried periodic noise, sine sweep and MLS. The input level is 200 mVrms.
With all of these, the delay problem appears at some point, but I think with the MLS signal the situation is better than sine sweep and periodic noise.
Sine sweep is better that periodic noise.
Also, sometimes the ARTA cannot calculate a clean impulse response and dispalys only high level of noise.
But your point is good, I will increase the signal level up to 300-400 mVrms to check if the problem disappears.
With all of these, the delay problem appears at some point, but I think with the MLS signal the situation is better than sine sweep and periodic noise.
Sine sweep is better that periodic noise.
Also, sometimes the ARTA cannot calculate a clean impulse response and dispalys only high level of noise.
But your point is good, I will increase the signal level up to 300-400 mVrms to check if the problem disappears.