303 sound
 

http://www.bbc.co.uk/news/magazine-15652440

Low quality recording, but still interesting.

Wow fantastic footage,amazing that it still fires after 70 years covered in bog!!:o

Great to hear a bit of history.:grin:

soudns like a an airsoft gun :grin:

nice find and good video, thanks

OMG! Sounds like Cliffs of Dover Spitfire/Hurricane guns!

I'm amazed!

;)

softer sound than i'd imagine, as in latest patch but i could imagine 8 of them would increase sound 8 fold?

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That would be a milkmaid calculation :D

At first the guns don't fire synchronized, so the soundwaves sometimes add up, somtimes they cancel each other out.

It would be louder as a single gun, but a more constant noise, like ripping texture.

I think you have a pretty confused concept of sound waves. I personally don't know of any "don't fire synchronised" setup, once you squeeze the trigger they all go together, but even if it wasn't the case, with the insane rates of fire these guns had (the RAF ones had modified barrels and bolts for a higher ROF), you could hardly tell the difference whether they all shot with the same or not.

Did your turn up your volume to 11?

I doubt that our PC sound system could reproduce the sound levels required. I couldn't find a .303 but power wise it's within cooee of a .308

150+ decibals is fairly loud. luckly the closest Browning is several metres from the cockpit of the plane.

My ears are still ringing from my youth when only wimps wore ear protection!

Cheers!

I can't follow you here, first a slight and then unprofessional common places which doesn't prove anything.

I answered to the opinion that the sound should increase eight-fold, and you?

Sorry man, but the answer you gave is not correct and misleading, hence my post. There is a lot of this going on in this forum, it would be better to keep things as accurate as possible for the sake of the sim and people's knowledge.

It would behave you well if you could point out which part you assume i've got wrong and how so.

your assumption

is simply wrong, soundwaves won't cancel each other out, they will just make things louder. Regardless of the synchronisation, the rate of fire is so high that the sounds will superimpose and create a concerto for .303, especially because they're sitting so close to the pilot.

OK then in the interest of correctness..

You said " I think you have a pretty confused concept of sound waves."
His understanding of soundwaves seems ok to me.
Soundwaves can cancel each other out if they are the same amplitude, if they are similar you get disruption to the waves which can mean either an increase or decrease in volume. I'm a sound engineer by trade. It's like when speakers are out of phase.

You also said.. "I personally don't know of any "don't fire synchronised" setup"
I'm pretty sure that British brownings were not synchronised. They were fired pneumatically which meant they couldn't synchronise them.

Aircraft with synchronised guns fired them electrically. I think the 109 was like this but my 109 knowledge is limited.

The wave forms need to be opposite phase (hope thats the right phrase) which would be extremely unlikely, So for every quiet spot there would be correstponding loud spot where the wave form built each other up.

Over eight gun I would think it would average itself out.


Even slight mechanical difference between the guns would cause a variation in the rate of fire.

Are the German guns fired on a pulse that would allow them to syncronise rounds or does it just opperated a solenoid that moves the shear that restrains the bolt?

Cheers!

As the guns don't fire synchronized there will be of course parts of the sound cancelled out, parts added up and parts filling the "free"spaces.
That is what i meant, the sound doesn't increase 8-fold, it increases, but without actual measurement one can't say how much.

you simply can't algebraically sum two sound pressure levels. a sound pressure level L1=50db + another sound pressure level L2=50db isn't equal to a sound pressure level of 100db.
The mathematics law governing this phenomenon is on logarithmic base.
The increment should be minor of 0,5db
Cheers

Yeah, opposite phase is the right term :). To completley cancel out it would need opposite phase and the exact same frequency. If you've got 8 guns all firing at the same rate at some point in the room you'll get opposite phase somewhere. (Because the sound spreads out in a circular way, unlike speakers) but it would be hard to notice. But you'd get some cancellation, and probably some amplification somewhere else. In short, it would sound messy!


I have no idea about how exactly synchronised guns work, but they all recieved the same electrical pulse to fire at the same time, with pneumatics they just carry on from where they were in the cycle.

I've noticed in the latest patch the 303s are quieter .. which i would assume means better efficiency?

When I open fire in a spit, i can barely hear the guns .. this cannot be correct! I suspect in reality if you opened up with 8 x 303 it would shake the plane, causing rattle n rollin.

The video shows a low pitched sound, 8 x such would probably be the same pitch but louder .. i would assume?

... more milk maid logic .. :grin:

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I love when people start speculating about how it might have sounded from the cockpit to fire 8 brownings... (although I tend to do it myself)

Unless you've done it, you can't possibly know.

Yes, now it's quieter. and pretty high pitch. Then again, sitting in a cockpit of a warbird with a 1000 HP Merlin growling in front of you at 3,000 RPM...that kills pretty much every frequency and I wouldn't be surprised if only the higher frequencies came through. Then again, I might be wrong. We can only be sure of the rate of fire and it sounds correct.

The only reference I've read about it is that it sounded like "tearing calico" - that means 1) high rate of fire 2) high pitch - at least those are the conclusions I've jumped to.

All in all, I have no idea wether the sonud we have is correct or not, but it's not implausible (give nmy limited knowledge and experience)

I remember watching a doco where a spitfire pilot was interviewed and the first time he opened fire, the guns were silent "hmmm... remarkable and quiet he thought" .. until he realised he hadn't switched from safety to fire! :grin:

i assume there was a noticable difference.

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Haha! :grin:

Saw this on BBC yesterday, Dan Snow's got a pretty cushty job to be honest :)

Don't think I've ever heard a weapon sound through TV that sounds anything like the real thing you hear in person...then again I've never heard a .303 fire in real life. :-P

Maybe we should ask this guy ;-)

http://www.youtube.com/watch?v=oiYDP...e_gdata_player

S!

I thought the P-40 had .50cal except the first models.

yep, it's .50 cals, but still the pilot could tell us what it sounds like from the inside.

I've heard a .303 1917 BSA SMLE fired by a numb skull who shot when the line was supposed to be cold and most of us had our ear protection off.

It was about 10 years ago. My left ear still rings a bit.

Firearms are loud!!! a lot louder than on TV or in a Hollywood movie. Our computer speakers would be destroyed trying to duplicate accurate firearms sound pressure levels.

imo the sounds are much improved over previous titles, german 109 sounds spot on , they need to tweak the merlin sounds and heavy bombers more.
as for the guns i agree they need more dynamics ..little louder maybe even add a audio slider in options.