I'm sorry, but when did I state that smoke detectors were 130dB :unsure:Power output is only one factor, and they are governed by dB output. You will never see a piezo provide anything past 130 dB. Most are 90 - 110 dB and like smoke detectors its the operating frequencies which get peoples attention.
Case in point smoke detectors.
Do you think they are 130 dB??
Not . . .
Teken . . .