Why is my crew generating 83 dB of noise with silent running and the blue light on?

[Hal8000]

https://imgur.com/fGPhqT3

I have the blue light and Silent run enabled. My crew is supposed to be whispering with Silent run, but my noise report is showing +83 dB.

In comparison, a propeller plane flying overhead at 1,000 ft above ground is +88 dB. My crew would have to be singing the "Hymn to Red October" from The Hunt for Red October at the top of their lungs through megaphones to reach +83 dB.

Can this please get fixed? I can't sneak into any port to lay mines with a crew generating +83 dB of noise.

[epicft]

It is ok. add an officer with an iron fist and 3 sailors to the command post - it will be 77 db
The specialization of the crew also reduces noise.

[Red_Seven_]

It's 83dB without a specified distance from source to recipient so it's pointless to compare to other sources. Also sound does travel different in water compared to air.

The important thing is if the actions you take to reduce noise actually do what they should and that's something which has caused some con sense over the last few weeks of the beta.

[Hal8000]

Originally posted by epicft:

It is ok. add an officer with an iron fist and 3 sailors to the command post - it will be 77 db
The specialization of the crew also reduces noise.

A whispering crew will not generate 77 dB of noise

[Hal8000]

Originally posted by Red_Seven_:

It's 83dB without a specified distance from source to recipient so it's pointless to compare to other sources. Also sound does travel different in water compared to air.

The important thing is if the actions you take to reduce noise actually do what they should and that's something which has caused some con sense over the last few weeks of the beta.

83 dB is what the game says my crew is generating, which can be heard by warships when I'm trying to sneak into a harbor. I'd say it's pretty relevant considering they're supposed to be whispering.

[DECAFBAD]

It's not real decibels. It's just a game, you'll have to figure out how well they can hear you.

[DECAFBAD]

I suggest that devs increase the decibel numbers by 500 - both emission levels and detection thresholds - just to show that it doesn't matter, the thing is arbitrary.

[Davinci]

Originally posted by DECAFBAD:

I suggest that devs increase the decibel numbers by 500 - both emission levels and detection thresholds - just to show that it doesn't matter, the thing is arbitrary.

General.xlsx - Settings page
Lines 164 and 165 - are those values represented in the game ?

[Hal8000]

Originally posted by DECAFBAD:

It's not real decibels. It's just a game, you'll have to figure out how well they can hear you.

I get what you're saying, but in the same screenshot it shows my electric engines generating +88 dB of noise, which is something to compare against.

I really don't think a whispering crew will be as loud as electric engines driving my propellers.

[Defacto]

What's the problem? Your engines are at the absolutely slowest creep speed and even then it's louder than the crew. The scale is logarithmic so 83 dB really is not very close to 88.

[-=[Sesa]=-Graf Zahl]

Originally posted by Hal8000:

Originally posted by epicft:

It is ok. add an officer with an iron fist and 3 sailors to the command post - it will be 77 db
The specialization of the crew also reduces noise.

A whispering crew will not generate 77 dB of noise

when people speak, they generate approx. 60 dB when people whisper, they generate approx. 30 dB now, in addition, approx. 26 dB must be added under water because water behaves differently than air. So you quickly reach 86 dB at normal speaking volume.

The specified sound level corresponds to the water sound level that can be heard from the outside, not the air sound level that prevails in the boat.

In addition, there are working noises that also occur at creep speed and emanate from people. The crew continues to carry out its work, which also causes noise. (Walking, operating levers, switches, valves, etc.)

[Red_Seven_]

Originally posted by Hal8000:

83 dB is what the game says my crew is generating, which can be heard by warships when I'm trying to sneak into a harbor. I'd say it's pretty relevant considering they're supposed to be whispering.

Yes, but a warship 5km away won't hear the same as another just 100m away. Still the game tells you that you're emitting 83dB. What does that tell you for each of those two ships? Nothing, because you have no idea how much they can hear. The number is just arbitrarily chosen and you just can't compare it to something like an airplane because with an airplane you'd know how far it is away.

If the devs had made it so the values were for a recipient 100km away and therefore they were very small in numbers you'd say "oh, they're really quiet" while they'd still produce the same noise level.

[Hal8000]

Originally posted by Defacto:

The scale is logarithmic so 83 dB really is not very close to 88.

Do you have a source for that?

[DECAFBAD]

Originally posted by -=Sesa=-Graf Zahl:

when people speak, they generate approx. 60 dB when people whisper, they generate approx. 30 dB now, in addition, approx. 26 dB must be added under water because water behaves differently than air. So you quickly reach 86 dB at normal speaking volume.

Wrong reasoning the 26dB is not because of physical differences, it's because of a different reference for the ratio is commonly used (1μPa vs 20μPa).
Just because a US dollar is equal to 20 Mexican Pesos doesn't mean that every Mexican is 20 times as rich.

[DECAFBAD]

Originally posted by Hal8000:

Originally posted by DECAFBAD:

It's not real decibels. It's just a game, you'll have to figure out how well they can hear you.

I get what you're saying, but in the same screenshot it shows my electric engines generating +88 dB of noise, which is something to compare against.

I really don't think a whispering crew will be as loud as electric engines driving my propellers.

Please remember that this is just a game.
Or do you want to talk about how U-boats were never detected by sounds made by the crew because 99.9% of the sounds from inside the pressure hull get reflected back and only -75dB makes it through?
There's a recording on maritime.org of the crew of a submarine parked on the seabed loudly cheering. You can hear it OK in the sonobuoy, not very clearly, but you can hear that it's people. However that buoy is about 100m away from the boat and everybody is shouting as loud as they can. And that is a wideband sonobuoy, not an ASDIC specifically designed for ultrasonic ranging as well as listening. The Tyoe 112 set had a listening mode that used 10kHz modulation of the signal, to maybe detect torpedoes on calm days. There's not a lot of the human voice that high up.
It. Is. A. Game.

[DECAFBAD]

I truly recommend for everyone to turn off the detection hint and just enjoy the U-boat game for what it is.