it's for their own good.
1) the differing frew spectrums of music - a pblm you identified. But circuits could do a primitive spectrum analysis to see if there is a large amt of high freq sounds in the signal
2) The efficiency of the speakers: Given a specific signal, two different speakers will output a different SPL. Any such circuit would need the ability to be adjusted (by the manufacturer) to compensate for the differences in speaker efficiency
Once you've done that, all you need to do is put a limiter on the signal. That would prevent the signal from going over a specific peak. However, adding a spectrum analyzer and a limiter would be expensive. If done cheaply, they would color the sound, most probably make it sound worse. Good limiters cost hundreds of dollars.
The peaks in volume generally last in the range of milliseconds making it impossible to "ride gain" in order to compensate for the limiters actions. In addition, in this case the limiter would be put "post-gain" so increasing gain would only make the limiter engage more often without any effect on the max level.Plus, like I said, it's the crescendos that get you. You would have to have a limiter that constantly "squashed" the peaks in volume in the music (whacks on the snare drum, crashes of cymbals, etc.), resulting in a music listening experience where the player was constantly lowering and raising the volume, making the experience unpleasant.
Ear buds are neither good nor bad. It depends on the user. I would imagine that most of the city workers who work in and under the streets of NYC experience enough sustained noise at 80dB or higher that probably the only way many of them can hear music is with a good set of ear buds. I'll guarantee you that at least 30% of the cops in NYC have hearing loss to the degree that it affects conversation.
"When Faith preaches Hate, Blessed are the Doubters." - Amin Maalouf
Sarcasm aside, On the baby formula, in the past, the sugar content has been too high...people MUST read labels and the info MUST be correct.
Pop Tarts are bad enough when new,,,the expiration dates are coded and hard to find and read. Rather than business designing the standards, the consumers should do this...much reform is necessary in this area..
As to earbuds , I don't know..
As far as I am concerned the idiots can play their so-called music as loud as they wish; but, 50 years down the road, I will NOT pay for their hearing aids !