Option Screen screenshots

[Nisgeis]

Originally Posted by Frnocom

I don't mean to keep going with this, but if the facts in wiki are anywhere near correct (one can't believe everything on there), it states sound through air is 343 m/s, where through water it is 4.3 times faster at 1484 m/s. Of course there are many variables.

Whatever it is, it has a speed, which was my point... it's not instantaneous, as it was in SH4 with the 'realistic sound travel' turned on. Let's hope it's fixed this time round!

Originally Posted by tommyk

i think about 330m/s in air and about 1530m/s in seawater. Depending on temperate and pressure..

And salinity (more salt makes it faster as it's more dense) ;-)

[tommyk]

Originally Posted by Nisgeis

And salinity (more salt makes it faster as it's more dense) ;-)

jupp, thats why I wrote 'seawater', more specific 'north atlantik seawater', but I think we have it good enough

would be interesting to hear the sonar reporting the explosion and then hear it 'yourself' in the tower... but quickjump from sonar to tower is not possible i think..

cheers

[Sailor Steve]

Originally Posted by tommyk

jupp, thats why I wrote 'seawater', more specific 'north atlantik seawater', but I think we have it good enough

would be interesting to hear the sonar reporting the explosion and then hear it 'yourself' in the tower... but quickjump from sonar to tower is not possible i think..

cheers

Hydrophones are more sensitive than unaided ears, just as binoculars outperform the naked eye. The sound doesn't travel to the hydrophones any faster though. The soundman can hear things no one else aboard can, but if it's something everyone can hear, he won't hear it any sooner.

[msalama]

...but if it's something everyone can hear, he won't hear it any sooner.

How come, if the sound source in question radiates into water and air both, and soundwaves are known to travel faster through liquids & solids than gases? Enquiring buggers with tiny minds want to know

PS / EDIT: Got it. Within typical hydrophone detection ranges the delay between the two is so short that it's not detectable by ear, right? AFAIR the shortest delay the human ear / brain combo decodes as an aural delay is some 20-30 milliseconds, and anything less than that is heard as a phase shift / comb filter effect... am I right?

[jazman]

Originally Posted by msalama

How come, if the sound source in question radiates into water and air both, and soundwaves are known to travel faster through liquids & solids than gases? Enquiring buggers with tiny minds want to know

PS / EDIT: Got it. Within typical hydrophone detection ranges the delay between the two is so short that it's not detectable by ear, right? AFAIR the shortest delay the human ear / brain combo decodes as an aural delay is some 20-30 milliseconds, and anything less than that is heard as a phase shift / comb filter effect... am I right?

Sound is just a pressure wave. So, a liquid/solid doesn't compress much, so the wave zips through. The wave going through air mushes through a very compressible material. I wouldn't say the difference is 20-30ms for something 500-1000m away. For something 700m away, the sound takes two seconds in air, about 0.45 seconds in water, so you're talking about 1.5 seconds difference.

http://en.wikipedia.org/wiki/Speed_of_sound

[msalama]

I see. So the difference is indeed detectable by plain ear, right?

[tommyk]

Originally Posted by Sailor Steve

Hydrophones are more sensitive than unaided ears, just as binoculars outperform the naked eye. The sound doesn't travel to the hydrophones any faster though. The soundman can hear things no one else aboard can, but if it's something everyone can hear, he won't hear it any sooner.

The sonar WILL hear it sooner than you will hear it on the Tower because sound travels faster in Water than in air!

An Explosion 5km away will be heard by the sonar in 3,3 secounds and you will hear it 15,1 after it goes off.

[mookiemookie]

Originally Posted by tommyk

The sonar WILL hear it sooner than you will hear it on the Tower because sound travels faster in Water than in air!

An Explosion 5km away will be heard by the sonar in 3,3 secounds and you will hear it 16,6 after it goes off.

How is the hydrophone operator going to hear anything if the boat is surfaced?

[tommyk]

Originally Posted by mookiemookie

How is the hydrophone operator going to hear anything if the boat is surfaced?

haha, you are right!

cheers

[DMB3428]

playing at 78% realism here but for some reason the game didnt take my settings at first, game seems to load pretty fast though i notice during about the halfway point i notice my network activity light blinking.. My internet connection is not the fastest DSL connection but working flawless so far during gameplay

[Frederf]

Originally Posted by mookiemookie

How is the hydrophone operator going to hear anything if the boat is surfaced?

No, but then again you don't have to be surfaced to see a target. Submarines have these things called periscopes.

One niggle about "realistic sound travel time" was that it was it didn't change the HYDROPHONE BEARING like it does in real life. You see a moving sound source will be heard "where it was" instead of "where it is" thus the bearing to a ship's center not only has to reflect the fact the propellers are in the back of the craft but also that the ship is no longer in the same position it was by the time the sound reaches the hydrophone. Real TDC (at least in fleet boats) accounts for this bearing delay but the hydrophone operator would not hear "lightspeed" sound.

SH4 got these effects wrong, the actual bearing and the hydrophone bearing were "lightspeed" as well as any changes in sound (say the DD RPMs up) were instantaneous to the hydrophone operator. Let's hope SH5 doesn't get this wrong as well.

[karamazovnew]

Originally Posted by Frederf

Let's hope SH5 doesn't get this wrong as well.

I nominate you for the Most Optimistic Person in History Award.

[mookiemookie]

Originally Posted by Frederf

No, but then again you don't have to be surfaced to see a target. Submarines have these things called periscopes.

Really? Submarines have periscopes? I'll be darned.

[Sailor Steve]

Originally Posted by tommyk

The sonar WILL hear it sooner than you will hear it on the Tower because sound travels faster in Water than in air!

An Explosion 5km away will be heard by the sonar in 3,3 secounds and you will hear it 15,1 after it goes off.

No, not at you - at me! Because of the previous periscope question, I was assuming the boat was underwater, and the soundman won't hear it any sooner than I will because I'm also underwater. I didn't even notice the "in the tower" statement!

Yes, assuming that he can hear it while surfaced, the sound will reach the hydrophones more quickly than it will reach the bridge. But will it be soon enough for him to get to a voice tube to report it to you before you hear it yourself?