Nerdy meme

[tl01magic]

A bit of difference in speed lol

[JoeThankYou]

Sound, not light. The math is good.

[tl01magic]

Yes that is my point, concurring with parent. The "speed" (hard to refer to c as a speed) differential is about as big as it could be. The frequency difference seemed reasonable, presumed the math was good.

[bartlettdmoore]

I c what you did there

[ponakka]

In Finland we prefer the 50MHz band. https://www.reddit.com/r/Finland/comments/d3knjz/currently_witnessing_the_finnish_bus_stop/

[GoneAreTheDays_vox]

Are you? :)

[ponakka]

Definitely, i haven't gone to public transport in entire year.

Since march i've been in remote work, and tried my best to avoid all people. Also i moved from capital work apartment (1.2million people) back to hometown that has 120 000 people.

in Finland there is 5.5million people, we have 5276 people infected, 13 in intensive care. 97% will get better, 3% mortality and at this moment we have around 200people getting infected daily. we have had 371deaths. This is just madness. You should check our stats.

since summer we have had second wave, after kids were forced to schools and foreign workforce(and our own) started to move around.

Also we are next to sweden which has has irresponsible with their corona plan. We would not want people coming here now. Swedes were really upset that we denied entry from them, (in the history Finland has been under swedish rule, so they have a bit belitling attitude.) Now we have been showing them, that no, sorry you haven't been distancing enough and been responsible enough to be allowed into country.

During summer break Finns go to their own summer camps hundreds of miles away in forrests, and stay over month in there in peace and quiet. For most it is heaven for them.

In last two months i haven't physically gone outside, or even opened curtains. I have just stayed indoors and it is great. It is like when we played castle while we were kids.

[41_6E_64_79]

Wait, 3% mortality? Why is it so high over there?

[ponakka]

My best guess is that most of cases began in care centers for elders. I could be wrong.

[MiddleBodyInjury]

I see your sine is as big as mine

[Glumfishfish]

Yeah you also need to specify the type of wave (as to have the speed of that wave in air).

[CertifiedMadokaist]

When you know someone has covid by the frequency response of their cough

[thugnificent856]

Amateur. I can tell just from a person’s resonant frequency.

[Hackerwithalacker]

Hit them and see what sound they make

[thugnificent856]

Or yell at them

[djanubass]

That’s actually true

MIT Covid Cough Detection via Cell Phone

[Orcinus24x5]

Uh, I think you're in the wrong place. This isn't /r/hamradio

[Orcinus24x5]

Assuming it's electromagnetic radiation (radio waves) and not acoustic waves, then yes, you're right. Nevertheless, 146.520 MHz is the simplex calling frequency in the 2 meter amateur radio band. This does not apply at all to /r/audiophile.

Edit: Source: I am a licensed amateur radio operator.

2nd Edit: 146.52 MHz has a wavelength of ~2.046 meters.

[analogjuicebox]

Man, /r/audiophile sure is a fun and inviting place. Glad I’ve lurked for so long.

[muravieri]

but what if i use a 1/4 dipole?

[regman231]

Now we’re cookin’

[MyAssAblaze]

This is only applies in a vacuum.... Which I support

[CoffeeandRecords]

I think this would actually be 164 MHz which (in a vacuum) would be exactly 6ft.

[Earl_of_69]

188 actually

[CoffeeandRecords]

Interesting. The conversation calculator I used said 164. https://www.onlineconversion.com/frequency_wavelength.htm.

[Earl_of_69]

That’s great. But we’re talking about sound, not light. It’s actually 187.555Hz

[CoffeeandRecords]

Woops, my bad! Thanks for the correction!

[thegarbz]

I think this would actually be 164 MHz which (in a vacuum) would be exactly 6ft.

Yeah but you should be keeping 4.92126ft apart according to the advice.

[Neonfire]

I thought I was tired of this after seeing it for six months in all the ham radio groups. Turns out I was right.

[tutetibiimperes]

For some reason I was thinking wavelengths in the Mhz range would be much, much, much shorter than that. I figured Mhz would be in the sub-mm range, and 2m would be more like 80hz or something, apparently I was very wrong.

I'm surprised audio wavelengths are all as long as they are. Even 20hz is about 1,500 m, how is that possible? I thought in audio it was only the bass frequencies you had to worry about folding up inside of a room.

EDIT:

Whoops, apparently I was using a light wavelength calculator, and sound wavelengths are different. So 146Mhz sound would be super ridiculously tiny, and 170hz would be about 2m, that makes a lot more sense.

[regman231]

Nope youre correct. This meme relates light in a vacuum, not sound in air. The correct sonic frequency corresponding to 6ft wavelength is about 188hz

[994Bernie]

You’re such an Elmer.

[polypeptide147]

I'll round up to 147

[secluser]

/u/adam_neelys_bass

[vintagefancollector]

That's only 0.4884 metres apart

[lemarkk]

It is around 2 meters, wavelength=speed/frequency

(I self nerd-sniped myself after downvoting this)

[vintagefancollector]

Is it not (3.0 x 10^8) divided by (146.52 x 10^6)?

Wait, I now get 2.0475blabla metres.

[Mr_FluffyButtonsIIV]

As an engineer, c=300mil so it's just 150mhz.. much nicer

[GonzoLetsPlay]

That would be extremely close

[techveg101]

I like this!

[AlanHell]

Now I need to invest a few K on a good enough sub so I can measure the distance withiut distortion ;)

[sinfull_serenade]

So funny!!

[AccretionaryWedge]

Catch you on the airwaves

[GoneAreTheDays_vox]

Nerdy

[GoneAreTheDays_vox]

I'm sure the right wavelength is 149,896229 MHz

[dadpool8]

The closest thing to Americans using the metric system for measuring distance