Yes, but they exist.
And you can get a kit for 110$ from here:
Plasma Ion kits
Not so certain it will be healthy to breathe magnetic nano particles either.
And you can get a kit for 110$ from here:
Plasma Ion kits
Not so certain it will be healthy to breathe magnetic nano particles either.
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It was a kind of joke.
i expect there is a safety notice with the kit , the produced gas is terribly toxic.
"Ozone is extremely harmful to the lungs, kidneys, brain and eyes. For example, a concentration of 9 ppm of ozone in the air will lead to pulmonary edema. Between this value and the average threshold of olfactory perception (0.1 ppm on average), there is dry mouth, cough, bronchial hypersecretion, dyspnea, retrosternal pain and abnormal respiratory system.
A simple concentration of 0.2-0.5 ppm of ozone in the air can already cause vision problems such as decreased night vision and poor light adaptability, increased peripheral vision, and modification of eye movement. In addition, there are kidney (acute nephritis) and neurological disorders (dizziness, asthenia, altered taste, speech disorder, poor coordination of movement, etc.).
European directives set a quality target at the daily maximum of the 8-hour average at 120 μg / m3 (60 ppb or 0.06 ppm) and the alert threshold at 240 μg / m3. This quality objective corresponds to levels 5 (French index) or 50 (European index) of information disseminated by organizations such as Airparif21, Airpaca22, Atmo23, etc."
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In principle it just means using lots of drivers, each in a discrete frequency band to minimze distortion. But although the drivers are now in low distortion regimes, the listener has to deal with the impact of multi way crossovers on the sound quality.
True, that is why I am hoping to get a stiff full range driver of about 6.5” with Xmax around 20mm p-p. This gives more flexible implementation depending on the maximum SPL design goal.
I've been fantasizing about removing the cone and dustcap from some Beta15A I have, and make a new and longer lightweight former for the voicecoil, place a mylar membrane over the chassis and attach it together with sandwiched carbon fiber and glass fiber rings distanced on the mylar membrane. If the problem is that the cone is "wobbly" during excursion then why not embrace it? Let high freq be emitted solely by a dome in the centre, attached directly to the VC and let the membrane dampen high freq out to the next sandwich ring.
But I do not have the time, maybe in 33 years when I retire.
But I do not have the time, maybe in 33 years when I retire.
There are different schools of thought on the subject of distortion. Zaph is one of the main proponents of the traditional view that minimizing linear and nonlinear distortion are most important.
Then there is the other school of thought of which seems to emanate from Canada and the ideas of researchers like S. Olive which is that distortion is way overblown and dispersion is whats important, and constant directivity is the goal.
Its interesting that Zaph wasn't impressed with Markaudio drivers, which didn't do terribly well with linear and non-linear distortion, and are clearly designed with dispersion in mind.
I haven't been doing this long enough to really have an opinion. The room matters a lot. Non-linear distortion seems easier to adjust to than dispersion issues. Linear distortion is really annoying. Part of this is that whatever you've been taught to pay attention to will affect your subjective listening experience. Sometimes though it seems like you brain easily compensates for room reflections.
Another possibility is that the less reflected sound you hear the more that non-linear and linear distortion matter, like headphones.
Then there is the other school of thought of which seems to emanate from Canada and the ideas of researchers like S. Olive which is that distortion is way overblown and dispersion is whats important, and constant directivity is the goal.
Its interesting that Zaph wasn't impressed with Markaudio drivers, which didn't do terribly well with linear and non-linear distortion, and are clearly designed with dispersion in mind.
I haven't been doing this long enough to really have an opinion. The room matters a lot. Non-linear distortion seems easier to adjust to than dispersion issues. Linear distortion is really annoying. Part of this is that whatever you've been taught to pay attention to will affect your subjective listening experience. Sometimes though it seems like you brain easily compensates for room reflections.
Another possibility is that the less reflected sound you hear the more that non-linear and linear distortion matter, like headphones.
Maybe those who think distortion is overblown haven't experienced the extremely low distortion at the mid range and tweeter levels provided by a line array with 20 mids and 10-20 tweeters per channel. Humans recognize loudness by the degree of perceived distortion(even if they don't know its distorting). In my line arrays, I often cannot tell how loud they are playing because distortion is so low(17 mid ranges, 32 dome tweeters per channel).
Where did you get that idea?
Personal experience......Could be wrong.... But its still my personal experience with my own ear/brain combination, having listened to a lot of speakers over the past 50 years and a few line arrays, including my own.
It wasn't until I built my large line arrays that I was unable to tell how loud they were playing. Maybe it was a combination of nearfield effects, low distortion and faster transient response.
I will leave it to psycho-acoustic engineers like Earl to explain my experience.
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Zaph may not be a researcher, but Kiippel is, and Zaph seems to use Klippel's criteria for choosing drivers.
If one really can't tell the difference between a 180$ Satori driver and a 50$ one then there's no point to wanting lower distortion. My own limited experience is that there is a difference but its more complicated than just total distortion.
My first build was "array" speakers (wwtww), and I have to say its strange listening to them because they are so much smoother. But theres a lot else going on like phase cancellation preventing floor bounce.
Everyone seems to agree that type of distortion that matters. Also more of one kind of distortion like 2nd could mask worse kinds of distortion.
Many full range drivers have fairly high distortion but better dispersion and coherency. Zaph seems to think that non linear distortion creates long term fatigue. It might, but then again a lot of OEM car stereos have high distortion and are pretty easy to listen to.
It might depend on what you're wiling to adjust to and what you aren't. Some people can sleep with the sun in their face but not with people talking and others are different.
I'm somewhat skeptical of the researchers saying its all about dispersion. I read some of the experiments and was less than impressed. Group bias and test bias that favors a certain outcome are so difficult to remove. I'm not saying research is pointless, just not the last word.
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Klippel never studied perception, it's not his thing. Klippel's criteria are more objective than subjective, which I have no problem with.
In the subjective world of speakers no one knows more than Toole/Olive.
Toole and Olive know all about "bias" in audio testing and do the experiments as well or better than anyone. It's not that I buy them 100%, but the 5% I may have disagreed with (and maybe not since talking with Floyd) is based on pretty solid evidence that I have. Anyone disagreeing with Toole/Olive to any large extent is likely on shaky ground.
In the subjective world of speakers no one knows more than Toole/Olive.
Toole and Olive know all about "bias" in audio testing and do the experiments as well or better than anyone. It's not that I buy them 100%, but the 5% I may have disagreed with (and maybe not since talking with Floyd) is based on pretty solid evidence that I have. Anyone disagreeing with Toole/Olive to any large extent is likely on shaky ground.
I'd imagine that a large part of that perception of loudness could be due to the room acoustics and not the speakers; I've heard speakers sound much more energetic and just louder than the same set of speakers in a more dampened room. I don't know how much that's true for all speakers though because I've only had that experience with more traditational speakers (i.e. cones in a box) and never line arrays or other speakers with that type of dispersion pattern.
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I've noticed this too. More specifically, lo-fi analogue sound is never fatiguing, lo-fi digital is downright irritating. Hi-fi is challenging to make non-fatiguing regardless of analogue or digital, it forces you to get it right.