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Anechoic

7,935 karma · joined November 26, 2009

Acoustical consultant based in Massachusetts
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Anechoic··on Google wants to take on Dolby with new open media formats
Do they have researchers working on new audio and video formats?

Short answer is yes. Search for "Dolby" under "Author Affiliation" in the AES paper search [0] and you can see the research they publish. (the papers themselves are unfortunately behind the AES paywall, but if usually authors will send you the paper if you ask nicely).

[0] https://www.aes.org/publications/preprints/search.cfm

Anechoic··on How mechanics keep 50-year-old BART trains running: Windows 98, eBay, and scraps
Isn't Bart entirely grade-separated?

Yes, but portions run near/under/over/alongside/in the median of roadway traffic. If you read the tweet thread you can see that a driver on the road was ejected into the BART ROW and was hit by a train.

Anechoic··on Steve Jobs negotiates Apple's deal with Microsoft (1997)
Context: https://en.wikipedia.org/wiki/San_Francisco_Canyon_Company

Later testimony in the United States v. Microsoft Corp. case revealed that, at the time, Apple was threatening Microsoft with a multibillion-dollar lawsuit over the allegedly stolen code, and in return Bill Gates was threatening the cancellation of Microsoft Office for Mac.[2][3] In August 1997, Apple and Microsoft announced a settlement deal. Apple would drop all current lawsuits, including all lingering issues from the "Look & Feel" lawsuit and the "QuickTime source code" lawsuit, and agree to make Internet Explorer for Mac the default browser on the Macintosh unless the user explicitly chose the bundled Netscape browser.

Anechoic··on Preview, the Mac app people forget about
Another great related feature is how easy it is to “print” to Preview

BTW, if you are trying to save a protected PDF from Adobe reader that won't let you save it in an unprotected format that's compatible with Preview, there is "print" document trick you can try since Adobe Reader blocks the system print dialog: pause the queue for your printer (if you don't have a printer, just "install" a network postscript printer), and print the document. The document is then saved to a non-secured temp PDF file in /var/spool/cups, to a filename starting with "d" (ls -l -t to find the most recent file). That file is normally deleted after being sent to the printer, but my pausing the print queue, the file is there long enough to copy somewhere. Rename the document, and you're good to go.

This is a trick from the Mac OS X Hints days, and still works, as of at least Catalina.

Anechoic··on Hiring discrimination: a problem for men in female-dominated occupations
In many states,[...] which is strictly defined as specific lists of races

Can you provide a specific example of a state where a protected class is limited to a specific "race" (as opposed to "race" in general)? There are states where minorities have a presumption of being discriminated against, but that's not the same thing.

Anechoic··on Ask HN: People who use different emails everywhere, who sold you to spammers?
The Democratic party is the worst here. [...] The Republicans send me postal mail and email, but no text messages or IMs.

YMMV, I get it far more from Republicans than Democrats. However it may be due in part to a GOP donor with a name similar to mine that lives in a state I haven't stepped foot in for over a decade.

Anechoic··on I'm a scam prevention expert and I got scammed
There was one time I thought I was being scammed, but it turns out there was an actual issue with my bank account.

Sitting at my desk at work, I get a phone call from my bank on by cell phone. "Mr. Anechoic, there appears to be a security issue with your bank account. We can resolve it for you. For security purposes, can you give your checking account number and the last four of you SSN"?

This is clearly a scam, right? I tell the guy there is no way I'm giving up that info for a random dude that calls me. He stresses again that there is an issue with my bank account, that the account will be frozen, and there is nothing he can do about it without the account and SSN information. I refuse again, and he tells me that I should go to a local bank to get it resolved. I hang up and go back to work. I log into my bank account website, and all seems fine.

After about 20 minutes, something is still bothering me, so I leave work to go to a local branch. I speak to a branch manager about what happened, and she agrees with me that it was clearly an attempted scam and the bank would never call me and ask for that information. But just to be safe, she checks my account on her computer. To our surprise, it turns out there was a security flag on my account!

She calls the bank security desk, they confirm that there was an attempt by someone in another branch a few states to get money from my account and the call I got was legit and logged in their system. We get the account locked out, and then the manager asks to talk to a security supervisor about the messed-up way they reached out to me. The security person basically said "this is how they do things" and didn't see the problem. The bank manager apologized, said it was messed up and she would try to run things up the chain to improve their process.

Damned if you do, damned if you don't.

Anechoic··on The day Steve Jobs dissed me in a keynote (2010)
I can’t understand why people are so attached to cords

In my case:

- one less battery to charge (on work trips in particular, I have a lot of devices/equipment that need daily charging)

- no worries about bluetooth synching or wireless interference

- less likely to lose

- better sound quality

To each their own.

Anechoic··on What happened to Russias Air Force? U.S. officials, experts stumped
The West should be offering ~$5 million per Russian jet that defects, along with EU citizenship.

Skeptical that would be effective for two reasons:

1. Pilots that have family back home probably won't be eager to take the offer

2. Russia has shown no qualms about targeted assassinations in foreign lands.

Anechoic··on What a $500k grant proposal looks like
The DoD gives as an example a rate of 125%!

For DOT engineering design firms and environmental firms, a typical overhead rate is 165%-ish, I've seen ranges from 125% to 250%. Over 180% is considered "high".

Anechoic··on Apple Podcasts suddenly became a five-star app
I'm shocked that they haven't been able to figure it out,

The problem is that it used to work just fine, things broke with iOS 13. I would be happy if they reverted to the Podcasts app circa iOS 11 or 12.

Anechoic··on I Have a Dream (1963)
I appreciate the sentiment for which this was submitted, but in reflecting upon MLKJr's legacy, please realize that he was far more than this one speech. He spoke about workers rights [0], civil rights backlash reparations [1], the dangers of incrementalism in civil rights progress [2], condemnation of the Vietnam war [3], and more [4]. Please resist the temptation to reduce his legacy to an out-of-context " content of their character" and call it a day.

And please remember that MLKJr was widely disliked in his time. [5]

[0] https://billmoyers.com/story/martin-luther-kings-fight-worke...

[1] https://www.theroot.com/exclusive-martin-luther-king-jr-talk...

[2] https://letterfromjail.com

[3] https://kinginstitute.stanford.edu/encyclopedia/beyond-vietn...

[4] https://www.nationalgeographic.com/history/article/how-mlks-...

[5] https://news.gallup.com/poll/20920/martin-luther-king-jr-rev...

Anechoic··on The absurdity of renting a car will no longer be tolerated
Yep, $5,000 (a five, followed by 3 zeros). It was a late booking, and we needed the room to haul equipment (work trip). This was back in September. When we returned in October, prices were sane again.
Anechoic··on The absurdity of renting a car will no longer be tolerated
Nope, we needed to haul around equipment for field work.
Anechoic··on The absurdity of renting a car will no longer be tolerated
I was afraid it would be much worse; I've heard of how crazy the car market has been in general. But I just didn't see it.

It really depends on where you are. This fall, we had our pick of vehicles in Chicago & Seattle, while we paid $5,000 for s 3-day minivan rental in Minneapolis. YMMV.

Anechoic··on The Sound of Silence: A Noise Map of the U.S.
LAeq is an “energy” average, it’s all of the sound energy from the sources that’s averaged over 24 hours. It reflects human response to noise since.
Anechoic··on The Sound of Silence: A Noise Map of the U.S.
Also interesting things like Whiteman AFB, from the recent stealth bomber post, shows nothing

Those maps are generated by publicly available data (traffic, railway schedules, etc). In the case of airports/airbases, the data are generated with radar flight tracks. Military flight track data are often redacted (presumably because they can leak aircraft performance data) so it's not surprising that modeled noise from stealth aircraft was not calculated.

Anechoic··on An alarming trend in K-12 math education: a guest post and an open letter
I read that as "stem & liberal arts" as one stream and "vocational/trade schools" as the second stream.
Anechoic··on Courts block two Biden administration Covid vaccine mandates
and whose head is appointed by one person

Note that while the position is appointed by POTUS, it is a Senate confirmed position - she was approved with a vote of 55-44 [0] (with five R votes).

[0] https://www.senate.gov/legislative/LIS/roll_call_lists/roll_...

Anechoic··on U.S. to release oil from reserves in coordination with other countries
On the one hand he’s closing pipelines which are safer than rail for oil transport.

By "he" I presume you're referring to the Biden administration. What "pipelines" have they closed? Biden pulled the permit for the Keystone XL, but that's not so much closing a pipeline as prohibiting a new one from being build (maybe you were including that under the umbrella of "closing"?). The other Keystone pipelines are still operating.

There is also news about possibility closing the Line 5 pipeline, but that hasn't happened and he recently indicated that he had no intention of closing it.

Is there another (or multiple other) pipelines that have been shutdown by the administration? A google search only comes up with the Keystone XL and Line 5 pipelines.

Anechoic··on YouTube Dislikes Viewer
In the case of an entertainment video, I agree.

In the case of an instructional video, it can really be frustrating to watch 10-20 minutes of something before realizing that the maker did it wrong, didn't document it adequately etc. Those videos tend to have a high ratio of dislikes to likes and that can easily prevent one from wasting their time.

I've been doing a lot of home renovations this past summer and watching instructional videos to help guide me. There's a lot of trash out there and it's not always immediately obvious as so without watching for a decent chunk of time. Conversely, there are a lot of videos with low-production values that are highly useful, so judging alone based on ten seconds can be misleading.

Anechoic··on DIY Acoustic Camera
those smd mics can't be more than $1 or so each

The actual mic capsules are likly far cheaper than $1 a piece (probably closer to $0.10 than $1) but the mics in an array need to be phased-matched. The two approaches to getting phased microphones are 1) building them using precision techniques so they are phased-match from the start (which is expensive and why pro phase-matched mics are around $1,000 each), or 2) get a whole pile of cheap mic, test them one-by-one (or really, pair-by-pair) and select the mics that are best phased-match to use them in the array. The #2 approach is cheaper, but does add cost.

Anechoic··on Apple is ready to admit it was wrong about the future of laptops
As for ports, who still uses SD cards?

SD cards are used for a lot more than just cameras, especially among pros of many different stripes.

Anechoic··on Police are telling ShotSpotter to alter evidence from gunshot-detecting AI
It's presumably some sort of machine learning to distinguish gunshots from firecrackers, backfires and other kinds of impulsive sounds one would find in a city. It just does not appear to work well.
Anechoic··on China unveils 600 kph maglev train
> Any metro can plop an airport down

Development of a new runway at an existing (US) is a $billion* endeavor and can take decades.

Anechoic··on China unveils 600 kph maglev train
Yes. The noise impact of trains is measured in hundreds of feet (maybe thousands if a locomotive is blowing a horn at a grade crossing). The noise impact from an airport is measured in miles.

Furthermore, for a given noise level, any number of surveys have shown that noise from planes is more annoying than from trains or roadways.

Anechoic··on iMessage, Apple Music used by NSO Pegasus to attack journalist iPhones
> , or of choosing not to do either of those things if they don't want to. Obviously, you can currently install and use other applications that provide the same functionality, but you cannot uninstall or disable defaults.

With Apple Configurator you can disable Music and Messages. It’s not the most user-friendly method, but it is possible.

Anechoic··on Two days before condo collapse, a pool contractor photographed damage in garage
their soil stability test holes kept failing inspection

What do you mean by "stability test holes kept failing inspection"? If you're referring to geotechnical boreholes, there's nothing to inspect - it's a test of (among other things) soil strength. It's certainly possible to have soft/loose/low-strength soils (soft/loose solis frequently cause the borehole to collapse on itself, that's not unusual) but that doesn't speak toward safety. The building just has to be designed & constructed to account for that, usually by stiffening the soil and/or using a pile foundation.

I’ve always wondered how many other buildings are in the same state.

Given the loose soils and relatively high-water table in Seattle? Pretty much all of them. Structures can be built on soft ground, it just needs to be done right.

Anechoic··on It’s time to break up the Ivy League cartel
You can only believe this if you've fallen for the spin perpetrated by media outlets.

The only reason you think there is (or was) an epidemic of police shootings of unarmed Black people [...]

This is unfair - note that the comment you are referring to didn't specially mention police unarmed shootings of blacks, the comment was about disportionate policing and killings (which presumably includes, but is not exclusive to shootings of unarmed citizens). I mention this because police shootings are not the only manifestation of institutional racism. There are also unjust arrests, accusations, beatings (remember, Rodney King wasn't shot), convictions, and general mistreatment. You might beat the rap, but you won't beat the ride.

As a relatively well-off, straight-laced black man, I'm not overly afraid of getting shot by police (although I think I got close to catching a bullet once), but I am terrified of a stop going bad in some way, not because of what I observed in the media, but because of my own personal experiences.

I live in a high-crime city in the northeast and as big component of my job is spending time in high-crime parts of cities all over the US (most recently, Chicago South Side, including Altgeld-Murray projects). The only times in my life where I thought my life or safety was in serious jeopardy involved interactions with police.

Furthermore, Black communities are often strong advocates of retaining or even increasing police presence

Absolutely true, and that reflects my feelings as well. But that is not the same as saying black communities trust police.

Anechoic··on Amazon warehouse injuries '80% higher' than competitors, report claims
And comparing to retail workers at walmart also seems a bit weird?

The comparison is with Walmart warehouse workers, not retail workers. See the actual report posted by others.

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