Talk:Siren (noisemaker)

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[edit] sound power

The article includes the text "sound power (123 dB at 10 feet)". As it stands this is ambiguous. Its most likely meaning is one of:

• sound power level of 123 dB (re unspecified unit)
• sound pressure level of 123 dB (re 20 μPa) at 10 ft
• sound level of 123 dB(A) at 10 ft

Does anyone know which of these (if any) is correct? Thunderbird2 (talk) 15:52, 20 January 2008 (UTC)