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Few phones respond well below 200 hz.My app shows cca 10db less than GLM mic. Maybe phone does not measure bass?
Few phones respond well below 200 hz.My app shows cca 10db less than GLM mic. Maybe phone does not measure bass?
Isn't that the real world. Even you record at fixed frequency for 20 second, your waveforms is still not the same at every cycle.Most likely your readings are no good. With a test tone you get standing waves. Change frequency and you are in a different pattern of standing waves.
that's because most microphones on a phone are C-weighted by default. I experienced similarily weird calibration stuff when i wasn't using relatively high frequencies.
Few phones respond well below 200 hz.
Besides a cal, some method to properly hold the phone is a good idea, if you expect reproducible results from test to test.Not sure that even the microphone frequency response matters that much, as long as there aren't any major peaks. Atleast A-weighting should be measured well.
The question is, how is any phone app supposed to know how sensitive a random phone models microphone is? It's no different from any random microphone you might buy. Unless you have calibration data for it, or calibrate it yourself to a known volume level, the results are meaningless. UMIK-1 comes with the needed calibration data, and it's USB so you can't mess things up with some pre-amplifier volume control etc.
Unless the software specifically guarantees some results for your phone model, like Decibel X ("Tested and calibrated for all Apple devices"), it's a crapshoot. Decibel X allows to calibrate yourself (easy to do with UMIK-1 beside). It can even correct for frequency response besides sensitivity, but I was too lazy for that.
I believe so too, so this thread is only useful if people with calibrated mics chime in.Few phones respond well below 200 hz.
Some phone apps do detect the model phone and are more or less calibrated. Apple isn't the only one for which that is true.Not sure that even the microphone frequency response matters that much, as long as there aren't any major peaks. Atleast A-weighting should be measured well.
The question is, how is any phone app supposed to know how sensitive a random phone models microphone is? It's no different from any random microphone you might buy. Unless you have calibration data for it, or calibrate it yourself to a known volume level, the results are meaningless. UMIK-1 comes with the needed calibration data, and it's USB so you can't mess things up with some pre-amplifier volume control etc.
Unless the software specifically guarantees some results for your phone model, like Decibel X ("Tested and calibrated for all Apple devices"), it's a crapshoot. Decibel X allows to calibrate yourself (easy to do with UMIK-1 beside). It can even correct for frequency response besides sensitivity, but I was too lazy for that.
It isn't a matter of same cycle. Your speaker could be putting out exactly the same sound level at two different frequencies. Yet you are in a peak for one frequency with your microphone and a valley for another. So you would not expect a sound level meter to report the same level because they physically are different at your location in the room.Isn't that the real world. Even you record at fixed frequency for 20 second, your waveforms is still not the same at every cycle.
I doubt many people even realize this is a thing, they just download some random app (there are dozens) and happily post the numbers. Maybe someone will stumble on this and other threads and is educated, but this will end up in the archives soon too.Some phone apps do detect the model phone and are more or less calibrated. Apple isn't the only one for which that is true.
Same here, C or Z weighting via iPhone using the Decibel X app.96dB anechoic @1M and 96dB in-room at LP (Let say 3M for instance) are indeed two different things...
But AFAIC, my regular SPL for most critical listening is about 80dB+ at LP. Could be 10dB lower for chilling out, and 10dB over for loud, physical listening.
I would turn it down by more than 0.5dB, just to save hearing.More interesting if you are at 96dB SPL listening position, and you turn -0.5dB at your source, what is the result of dB SPL at your listening position.
Once in a while I will play at 90 to 95 db C weighted(proper SPL meter) for 10-15 min. But during my once a week sessions I still go loud but maintain that between 80 to 90db for around 30min and keep it at less than 80 db for the next hour so.There's similar topics already, you'll get just the same vague answers with mobile apps, no defined weighting etc.
"96dB" alone means nothing. Is the value A-weighted? C/Z-weighted? Average? Peak? All this also depends on how bassy music you listen, if you apply some house curve, amount of acoustic treatment etc.
90-95dB(A) is the max I physically like to listen when rocking out. It's loud, but I have an extremely treated/damped room which doesn't attack your ears like an echoing untreated room would. Now depending on the bass, C/Z-weighting for the same can display up to 110dB(Z). Peak value can be as high as 120dB.
If I might make a suggestion? Would you consider changing this thread into a Poll? Set a few ground rules (Like normal casual listening level and not Movie or Party music levels) and create vote ranges in dbs groupings. Example: 50dB - 55db; 56dB-60dB; 61dB-65dB; and go up to maybe 100dB? This way will make the results available to everyone and easy to understand as the Poll results will be self evident. Just a suggestion. Might have to start a new thread? If you do we can close this thread and leave a redirect link to the new one.If you measure, what is the SPL at your listening position?
This has often been mentioned here and there, but I'd like to compile it and under the same criteria for everyone; only if you have an SPL meter and you measured at your listening position.
I have to compare your answers, it's strange to me that someone would reach 96dB... I read what Amir wrote about Metas not being happiest little speaker at 96dB, but even approaching 90dB and the sound is overwhelming. Does anyone really ever listen at 96 or over? Even if it's just a few songs...
What has LUFS to do the with SPL? LUFS or dBFS is not even remotely related to SPL. They are different units.For music I have the loudness of my system normalized to -16 LUFS and I can comfortably listen to my system at -15dBFS max volume (peaking at 90dBSPL for a song with -16 LUFS loudness) for 30 to 40 minutes at a time.
I think it's also dependent on room acoustics and material, if the sound is just not good at 75dBSPL turning the volume up will just increase your uncomfort.
C weighting only affects the extreme octaves. For all practical purposes (like music monitoring) it is flat.that's because most microphones on a phone are C-weighted by default. I experienced similarily weird calibration stuff when i wasn't using relatively high frequencies.