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“Do no harm to the stockholders” would be the contemporary take.
“Do no harm to the stockholders” would be the contemporary take.
Indeed. While you were learning how to reverse the car I was studying how to reverse the time.
Same here. I grew up in a big city, moved around to different big cities, always been on foot, biking or communal traffic. Never felt the need for a car. I’m in the upper middle ages now so I doubt it’s going to change.
The irresponsible pitbull owners mindset right there.
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God damn, I though were being light hearted here. Now I got to go find a dark corner of shame.
Thanks! I’ll look into it!
Oh, that makes sense. I guess it be further research time. Thanks.
Yes, we agree on most everything and my understanding of both physics, mechanics and biology seem to agree with yours.
I guess the one main disagreement is if a pulse, either single or repeated, might potentially be more harmful than a sine wave of a single frequency. According to the teachings I’ve had, or my recollection thereof, a pulse or impulse may carry the sum (or zero sum) difference if any ramping wave, but the nature of the impulse it literally hits differently. A transition of difference in state versus a forceful immediate change. A push or a slap. Or a push and pull versus a slap and yank, should we speak of a complete cycle.
This was what I attempted to illustrate with the plunger example. If you are familiar with a plunger, you’ll know that the method of operation is not to keep a harmonious cycle, but to yank it aggressively in order to transmit a whole lot of impulse-like energy and forcefully release buildup or blockage in the pipes. My argument is that should we have two identical sinks with identical blockage and we’d manage to conduct an experiment where both plungers operate at identical frequency and amplitude, but that one plunger pumps in a harmonious cycle while the other does a pulse-like push pull, the latter would yield more successful results. Hence my conclusion is that despite the state being identical before and after, theoretically the amount of energy may be the same, there is a difference in how the energy is transferred depending on the curvature of the actuation on the plunger. Or the speaker cone. Though through air instead of water and air compress while water doesn’t. But still.
So the frequency of a repeated waveform and the shape of the waveform are not interchangeable. I’m sound the frequency carries the root tone, the shape carries the multiples. A perfect impulse (or other digitally generated waveforms) carry in theory an infinite amount of frequencies. Again, carry may be a misnomer depending on the discipline and of course the perfect is unobtainable so in practice the frequency spectrum is limited to one bandwidth and spectrum or another. Not that really had any bearing in our discussion.
Finally, I disagree with the argument of the engineering in headphones. Those limits are with respects of quality of sound reproduction. They are not a guarantee of hard limit of potential output and not intended to be. I don’t engineer speakers but it’s quite common paradigm in engineering in general that you benefit in quality and reliability should you accept a modest degree of unused overhead. Mistakes and bugs happen and it is especially vulnerable when it is reliant on hardware and software in the earpiece itself, as with my personal experience of faulty earbuds that emitted bursts of painful high frequency noise despite playback being of moderate volume. There are no intermediate steps of filtering, as with analogue gear, so should a faulty component cause a pop, it may well do so from the one extreme to the other.
I apologize for my frustration. I’ve been experiencing lately that I try to communicate one thing and the recepient keep projecting it into their own frame of reference and insist I’m talking of something that I’m not. I’m a bit touchy and I’m sorry about that.
Dude, I’m not trying to speak like a acoustician. At closest I’m speaking as an engineer with some knowledge of sound and acoustics from ages ago or maybe a musician, I don’t know. If you expect random people to use professional terminology to have a conversation it’s really your own mistake. I mean it in a constructive way from my own experience of taking with people on whatever I happen to know more about than them.
The contrast of a pulse as a rapid shift of air pressure and multiple ones in rapid succession of high amplitude in the context of causing damage to the inner ear? I am honestly struggling how to explain it any clearer.
Ok, I’ll give it one more go.
As you say, it is not important what or how the pulse or burst of pulses are created, but digital to analog conversion of a signal can create impulses that are literally as rapid as can be by the laws of physics that are extremely rare organically and in particular by amplitudes that you get in headphones. A burst of such impulses, I’m avoiding the previously used terminology, of random but high frequency and amplitude is like having a tiny plunger jerking like crazy in your ear like nothing the ear has ever evolved to be able to deal with.
Not because digital vs analogue, vinyl vs CD vs mp3, gold plated monster network cables or helium cooled SPDIF connectors. No magical thinking. Only changes in air pressure. Changes in air pressure of the very fast and strong variety.
Sigh. Acoustic vs digitally generated noise.
Acoustic noise is what you hear outdoors from the wind, waves, leaves, whatever. An absolute myriad of tiny impact noises and scrapes and brushes and whatnot mixed together that become a dense complex texture that can be characterized as noise, although technically it is just a massive amount of single individual sounds. Acoustic noise can be found in many frequency ranges but human ears are generally good at handling with the common organic ones. Thanks, evolution!
Digitally generated noise. A sequence of random1 values that plays at the frequency rate of whatever means of digital to analog conversion is used. Digitally generated white noise consists statistically2 of all frequencies within the range of the sample rate at all volumes reproducible by the bit depth.
Digitally generated noise3 is not limited by common physics for generating sound waves4, but can be of any frequency range at any amplitude, i.e. pressure differential, within the range of the means of digital to analogue conversion and playback. That is, potentially in a spectral distribution of sound that is straight up painful for human ears.
However, the big difference is that digital noise is not a mix of endless impact noises or brushes or whatever that each follow an envelope curve, but are rather a sequence of shifting values without transitory ramping, i.e. pulses. That is, a sequence of shifts in air pressure that is literally as fast as it can possibly be.
Note that in the case of glitching5, the digitally generated noise may be limited only by the physical properties of the hardware and goes beyond what amplitudes the equipment is artificially limited to for pleasant and non harmful playback of music.
Can headphones or earbuds or loudspeakers reproduce a digitally generated noise in frequencies that are painful in amplitudes that are harmful for the human hearing apparatus? Oh, I think they do.
Anyway, I trust you are correct in your other point. It seems I used the wrong medical terminology as I was silly enough to speak in vernacular as non native English speaker without medical expertise. I expected to get away with a delirious misnomer to call years of continuous tinnitus and distorted audio perception a permanent hearing damage when it is clearly not.
My apologies for causing confusion.
1 Since attention to details are important; Most likely pseudo random generated. I know. I know.
2 Details, people.
3 Any digital noise. Audio that has been distorted until it has a frequency distribution that can be confused as pure noise, a data stream not intended for audio playback, a software/hardware glitch that flips significant bytes rapidly enough to cause a sequence of pops in such density it is perceived as a burst of noise. Whatever, use your imagination for further examples.
4 In our living conditions, on planet earth, at this time.
5 Generally speaking, not specifically to any example mentioned in this context.
Haha, uh oh, I will try to not take offence. I’m in no way an audiophile, though I do have a nice stereo system for listening to music rather than listening to the equipment. I did venture into doing sound based arts and installations and stuff when I was younger though so I do have some insights of how sound works. It was a “colleague” l knew back then that had the injury mentioned from an incident in a sound studio. If memory serves me right it was an accidental digital feedback loop that hit the ears like a brick wall and despite it was less than a second it was enough to cause permanent damage.
Oh, thanks for the correction. I seem to have misunderstood the injury when I got it described to me.
The source of the sound is the speaker element of headphone. I thought that detail was obvious. A speaker reproduces any signal fed into it as to best of it’s abilities. Acoustic recordings, sounds mimiking acoustic sounds, analogue or digital synthetic sounds, static noise… And even a digital pulse that goes from zero to maximum amplitude in one instant that is extremely rare or near impossible for even the most aggressive acoustic sounds. Acoustic or analogue noise is basically a sum of random frequencies all playing at once, while digital noise is a constant stream of random clean digital pulses.
Earbuds that aim to create a seal in order to isolate from external noise are dangerous in particular as there is nowhere for the sound waves to dissipate. Some parts are absorbed by the flesh of the ear canal but other parts become resonant waves that only add to the amplitude and hence the stress to the ear drum.
I had a pair of faulty ANC earbuds that would make digital pops. They weren’t necessarily louder than the music playing but damn they hurt like an unklefucker. It was like pure spike of treble cutting through the ear straight into the brain. The type of sound our ears have never encountered naturally in all their years of evolution.
I think it’s very different if it is a clean digital noise. Acoustic sounds, even when loud, have a brief ramping up. Digital noise can appear like a wall from zero to 110dB in literally zero time for the ear to adjust.
The ear has tiny hairs that raise to absorb sound and protect the hearing (see comment for a correction). I know of somebody that had a digital noise cut right through them and cause permanent hearing loss. Their hairs were flattened and no longer work. I don’t know the amplitude though.
I’m not against it if it is on a server or a cluster that are separated from the regular feeds. I don’t want to be spammed with mirrored content and try to interact with bots.
Worth mentioning that it is not about football, it’s about the people in and around a football team. I have zero interest in football and Ted Lasso is one of my favourite shows.
Depends. I’m homebound due to an accident and illness several years ago and can’t take part in activities or have a social life like I used to while I feel like I’m getting older and missing out on so much.
But then again I’m very fortunate that I have insurance so that I don’t have to worry about economy and I’m pretty good at making the best of my situation and have projects going so I feel I’m moving forward even though in other directions than before and at a highly reduced pace.
So… It could be better. But it could be so much worse. To be honest, I feel way more thankful for what I’ve got than sadness of what I have not.
It probably varies, but in principle yeah. Bread yeast main purpose is CO2 production and in winemaking gases are considered a side effect. Hence the refinement into different strains. Still, even 8% homemade wine is better than none.
There are also people doing all kinds of wild ferments with both wine and ciders from whatever yeasts happen to be in the air and battle it out and become dominant. Sort of you never know what you’ll end up with. I don’t know much about it but it seems like fun.
I don’t think many tourists would head out to the far away suburbs by subway. My recommendation is to avoid Drottninggatan and “City” with the exception of some architecture or particular places of interest because it is just really too much busy people and pickpockets and hot asphalt and concrete and glass and tourist traps and chain stores.