What is the sound power of the ATI HPSS32 siren in decibels? « on: April 10, 2023, 07:43:53 AM » Author: dor123
In the ATI website, is written that it is 3200W RMS, however there are no sources about the sound power of that siren in decibels like at Hormann website about the ECN3000, which have 123dB compared to the 132dB of the pneumatic Hormann HLS F71. There is one HPSS32 at a distance of tens of meters from my mother home, and the Hormann F71 had a deafening noise from my mother home. As horn speakers can't reach to such high levels of noise (Similar to a Hormann ECN3000 from very close), I don't know how strong is the HPSS32 from my mother home. So what is the sound power of the ATI HPSS32 in decibels?
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #1 on: April 10, 2023, 10:01:28 AM » Author: rjluna2
I think this may be about 35 decibel watt of output https://en.wikipedia.org/wiki/Decibel_watt
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #2 on: April 10, 2023, 12:55:47 PM » Author: dor123
I don't know how to do the calculation in Windows Calculator.
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #3 on: April 10, 2023, 03:59:48 PM » Author: rjluna2
Switch from Standard to Scientific and use log button to calculate the value there.
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #4 on: April 11, 2023, 12:34:42 AM » Author: dor123
I know how to switch from standard to scientific calculator, but don't know how to calculate the formula.
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #5 on: April 11, 2023, 05:38:21 AM » Author: Medved
If it states explicitly "sound power level", it means dB above the 1pW reference. So "123dB" would mean "123dB above 1pW", so 1pW * 10^(123dB/10) = 2W of radiated acoustic power. 132dB would then be about 16W of radiated acoustic power. Both seem to me quite low for a purpose build rather narrow band device with a 3kW input (wide bandwidth audio speakers use to have efficiency around 1%, with all the losses related to the required sound reproduction quality), with a device designed to "just make as much noise as possible" I would expect efficiencies in 10's % or so (so for a 3kW input device to be in the 150dB power level ballpark). But with the efficiency expectations I could be completely wrong here...
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #6 on: April 11, 2023, 07:41:14 AM » Author: rjluna2
Quote from: dor123 on April 11, 2023, 12:34:42 AM I know how to switch from standard to scientific calculator, but don't know how to calculate the formula. 10 * log (3200W RMS) = dBW
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #7 on: April 11, 2023, 08:13:18 AM » Author: dor123
10*log(10)*(3200)=3200
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #8 on: April 11, 2023, 08:41:09 AM » Author: rjluna2
No, that is 10 * log10 (3200) https://en.wikipedia.org/wiki/Logarithm
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	Re: What is the sound power of the ATI HPSS32 siren in decibels? « Reply #9 on: April 11, 2023, 11:26:30 AM » Author: dor123
I don't know algebra.
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I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.