> When the German engineer Karl Benz invented the first petroleum-powered automobile, he did not just create an engine with wheels; he set in motion an industry that revolutionized the way society was structured.
Example (for both functions):
/* Emits a 7-Hz tone for 10 seconds.
True story: 7 Hz is the resonant
frequency of a chicken's skull cavity.
This was determined empirically in
Australia, where a new factory
generating 7-Hz tones was located too
close to a chicken ranch: When the
factory started up, all the chickens
died.
Your PC may not be able to emit a 7-Hz tone. */
#include
int main(void)
{
sound(7);
delay(10000);
nosound();
return 0;
}
And most speakers can play infrasound for many non-sinusoidal waveforms [0]. They'll drop the fundamental and some lower-end harmonics but can still give a sense of what it sounds like
For resonance the external driving force must match the resonance frequency of the system, but wind is rarely/never purely sinusoidal.
> Follow-up 2: Yes, I know that the Tacoma Narrows Bridge collapse was not the result of resonance, but I felt I had to drop the reference to forestall the “You forgot to mention the Tacoma Narrows Bridge!” comments.
https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...
That was such a great machine. We rearchitected our systems around it.
For me, that is less meaningful and more random than a youtube link. I have absolutely no clue what you are talking about.
a known problem in cutting vinyl records are sudden bursts of high volume frequencies around 100 hz, that have the potential to make the needle skip with a normal amount of weight on the tone-arm.
-------
Without the ECU you can easily break it by starting too slow
TFA was lacking details so this is merely a retelling.
Janet Jackson had the power to crash laptop computers (2022) - https://news.ycombinator.com/item?id=41534483 - Sept 2024 (79 comments)
Janet Jackson had the power to crash laptop computers - https://news.ycombinator.com/item?id=32483211 - Aug 2022 (12 comments)
Google's response after looking at the crash dumps: "WAI, your battery is degraded" (IIRC my phone was less than 3 years old).
As for fixes in software, it's either treating it as WAI, or secretly throttling down the phone, like Apple did, for which they got accused of planned obsolescence. Neither choice is good (though actually informing the users would go a long way).
That’s about the time I would have given up on the investigation and called in an exorcist.
> The main event was a brand-new mixing console called the Harrison Series 10, which was the first analog console to feature a digital control surface, with full automation of all parameters. Jimmy Jam and Terry Lewis were the first studio to have it, according to Jam. This meant that they could cut down the time it took to switch songs to about 10 minutes because complex mixes now required little-to-no cross-patching.
https://reverb.com/news/the-making-of-janet-jacksons-rhythm-...
Reality must have been falling apart for someone for a brief moment there.
The issue of music crashing a hard disk drive was a genuine problem. Since I later specialized in hard drives, I can confirm that every manufacturer faced this issue as multimedia laptops became more common and we transitioned to higher areal densities. To state the obvious, we shrank the tracks every time to achieve larger capacities. We were doubling capacities every nine to twelve months when we first introduced MR, GMR, and PMR heads. The hard drive industry employs incredible control theory experts due to the requirement of keeping a head on track. Personal opinion, which I probably should research, but I believe that one of the densest concentrations of Ph.D.s in leading edge control theory could be found within the hard disk drive industry. Amazing things happen when you're trying to fly nanometers off the disc in a track that is maybe 100 nanometers wide at the time.
By 2010ish, as part of our development suite, we actually played music through the speakers to identify these types of issues. The origin of this practice actually came from the ODMs in Taiwan. Therefore, Janet Jackson was not the standard qualification song we used. Instead, it was popular hits from the Chinese pop market. There were also Western songs within the suite, but I remember our team blasting Chinese pop songs at full volume on multimedia laptops.
Laptop development began moving heavily to Taiwan in the mid nineties. By the time the early two thousands arrived, there was a massive amount of competence in Taiwan regarding chassis design engineering. As time progressed, every American PC company continued to outsource development to Taiwan and eventually to China. As development was outsourced, the ODMs would work with suppliers because we wanted to present solutions to the OEMs that were free of issues.
EDIT: By the way, it wasn't necessarily a blue-screen crash. I'm not saying that that couldn't happen, but generally what we did is we had the throughput test that we were run on the hard drives. Then we would go blast the music full bore and there were certain bandwidth requirements that we needed to get out of the hard disk drive. So to add some more details behind this, I would describe it as a performance issue and the blue screen issue was relatively minor. However, this was a number of years ago and I don't remember the exact percentages.
Some dude hears somebody tell a story about sth 20 years ago, puts it in a blog, and here we are on HN, nobody questioning whether it's actually accurate. Of course Raymond Chen isn't just any random person, but the more important it would be to actually check? I mean, who hasn't heard people tell stories from decades ago, including colleagues reminiscing about the good old times "before y'all were born" only to realize later that it was vastly exaggerated or even outright made up.
Anybody around here with some actual first-hand info or at least another source besides this blog entry? I'd love to hear!
Thank dog for SSDs
In fact, if a magnetic HDD crashes, you may still recover some or all of the data by doing something hardcore, such as letting it sit for some hours in the freezer of your refrigerator, or immersing it in a bowl of rice overnight.
However, SSDs (and other flash storage devices) need to be switched on once in few months, otherwise there's a chance that some data stored in them may be permanently lost, as some cells may loose their power.
"As a reminder, an SSD's endurance rating is calculated based on how long it can store data if left unplugged after a certain amount of data has been written": https://www.tomshardware.com/pc-components/storage/unpowered...
The experiment Tom's is reporting on found twelve instances of data corruption on a low-end drive that had been subjected to over two thousand full drive writes, four times its rated write endurance, then left on a shelf for two years. This is a demonstration of a bottom of the barrel SSD wildly exceeding expectations.
It's really important in conversations like this to accurately convey not just the existence of the failure mode, but also the realistic chances of running into this problem, and the extent of the problem when it does manifest. If a deliberate torture test can only produce a few kilobytes of data corruption after twice the duration and four times the abuse the drive is supposed to be able to handle, this problem should be described as extremely minor.
CD drives however, can store data indefinitely without needing refreshing.
But if you're stuck with hardware that old, an SSD isn't an option.
Modern ones use more exotic materials.
Why the weasel words? Does Raymond Chen not know which models? Or is it actually apocryphal.
From the follow-up post: https://devblogs.microsoft.com/oldnewthing/20220920-00/?p=10...
Neither us nor the OEM ever figured out why. They suspected that it was a weird combination of different bin combinations from different parts, but ultimately we had to change the method of delivering video to stop it happening.
Also seems not unreasonable for an employee like him not to specifically name and shame hardware partners. Maybe it'd all be fine, but I wouldn't blame him at all for not wanting to risk it.