Headphone safety - reducing volume to a Bluetooth speaker

Is there any way to disable the headphone safety volume reduction? I’m not using headphones, but my phone is linked to Bluetooth speakers and keeps reducing the volume of those, thinking I’m going over the 7 day dB limit for headphones.


A poorly thought through feature.

iPhone XR

Posted on Nov 25, 2020 8:52 AM

Reply
29 replies

Dec 7, 2020 12:15 PM in response to anna_mm

They are not quite right. It is the way that iphone monitors all BT devices as though they are airpods.

If you use a bluetooth device with low amplification and you need to crank the phone volume to max, then the headphone reports which are now in the Health app will trigger the 7day warning.

If your bt device has its own amplifier you should try to increase that while keeping iphone volume midway.


Look in Health app, tap browse, then tap Hearing, then Headphone audio levels then scroll to bottom and Show All Data

For each day you can see a report.

Here is one for my hifi with BT docking device. Because the sensitivity is low the phone was cranked up to a level which in actual phones would be 92dB but in reality nothing like it.

Dec 14, 2020 2:29 PM in response to LD150

It amazes me that not too many people seem to care about this. I guess most people got so used to crappy mp3 quality they don't even know anymore what decent audio should sound like. Oh well...


I don't have airpods, with my iPhone SE (gen1) I'm using wired Sennheiser headphones, this phone still had a minijack output.

The actual output level of the headphones also depends on the impedance of the headphone speakers. Not all headphones have the same dB SPL output with the same signal voltage level in dB(U). Apple probably calibrates for their own pods, but not for other brands...


Regardless, to answer your question: when you do not use the limiter function, (i.e. you just reduce the volume slider), listening to your airpods at low levels (like 75dB /80dB) should not be impacted by the new limitations, this is the same as before iOS 14.2. So if you're satisfied with these levels, this should not be an issue for you.


However, if you do use the limiter slider (Reduce Loud Sounds setting), I'm not so sure if the sound quality isn't impacted. It is possible that this setting introduces some degree of audible distortion to the signal, soft limiters usually do. I think I hear a difference with the slider on, but I might be biased (being angry at this limiter). It should be measured to know for sure.


What I am talking about in my previous post, is when you amplify this weak signal. That's when the noisefloor comes into play. Apple is plain wrong in assuming everybody is listening to Apple earbuds all the time. Before 14.2, there was no limitation, and you could send your signal "hot" (max output level) to your soundsystem amp (car/home/boombox/...), at full dynamic range. With this new health limiter, you're forced to feed a weak undynamic 80dB signal to your amp circuits. In doing so, you're actually also amplifying the noise floor of the phone, in order to reach the same dB SPL (sound pressure level) with your soundsystem. End result is same perceived "loudness" (dB SPL) but with severely reduced dynamics.


As far as I understand, World Health Organisation only did recommendations that were never enacted into laws, so I'm confident that Android phones will indeed feature hearing protection implementation, but optional.

Apparently Apple didn't receive too much complaints to give us an option switch in 14.3 update, so my hopes are down they will give it to us in any future update.


As a professional sound/light technician, I most certainly understand your point, many people suffer from tinnitus and permanent hearing loss. Warnings are a good thing indeed, and I do support that. Just like warnings on tobacco products and alcohol. With the latter, everyone has a choise to use them anyway, knowing the risks. So why should headphone usage be treated differently? People who want to consume their music loud, will find a way, one way or another. In my opinion, these warnings should be optional, and "on" by default.


My biggest concern is: not everyone uses their digital music player with headphones, that's a reality that cannot be ignored. In that usage situation, the dynamic range of iPhones is severely handicapped from 14.2 onwards, it is unacceptable for me.

Having good quality audio was a key selling point for me, the reason I chose an iPhone SE (the only small phone with a decent internal DAC). Taking away the full dynamic range, after I purchased their product, is not a smart move, disrespectful to me as a customer. The arrogance Apple displays here, with their patronizing attitude of knowing what's best for the users, is next-level. I've been using many macs for 20 years now, it saddens me to see which direction Apple is going now... Also with the T2 chips preventing the basic "right to repair" by yourself or 3rd parties.



Nov 26, 2020 9:39 AM in response to ChrisJ4203

OK thanks ChrisJ4203, sorry I missed the detail. Looks like regional rules are different which is extremely annoying, plus BT speakers appear as headphones which is obviously a wrong application.

It has not nagged me yet either.

I have put in my feedback anyway!

I am also trying to find the EU or WHO directive without success. The 2013 EU directive was never mandatory and was user overridable.

Dec 14, 2020 1:03 PM in response to --A--C--

14.3 was in beta long before anyone noticed this. Maybe give it some time. Nobody here knew it was happening.


Also check the proposed droid phone hasn’t implement this too.


BTW, Are you saying listening to airpods at 75dB or 80dB is electrically noisy? Just asking, because I cannot always hear distortion as I damaged my hearing in the 70’s with head phones. Too much hiss in my head now.

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Headphone safety - reducing volume to a Bluetooth speaker

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