Arctic Traveller wrote:Jay N wrote:
When I rewired the alarm systems, went with a two-tone siren (it's very loud)
*I"ve never subscribed to the "louder is better" school of thought (unless your talking about rock and roll, Ducati's, or F18's that is).* Most commercial boats I have run or been on that had loud alarms have had tape over them, or some other method of cutting down the ear splitting noise.* When ever I have installed an alarm system (other than a burgler alarm) I've simply used a piezo electric sounder of about 80db.* That's plenty loud enough, and will wake almost anyone (and I"m pretty deaf).* Once while my boat was stored in Ketchikan, the high water alarm went off, and was loud enough to be heard by someone walking by the boat. I got a call about it, but I was in Washington.* So I told him to simply ignore it, as I wasn't really worried.* Why?* The boat was on the hard, so it had to be rain water.*
The point is, even my little piezo sounder works fine, and if it does go off it doesn't scare the heck out of me, it simply notify's me to find the problem.* ..........Arctic Traveller
*The two-tone alarm indicates fire or flooding, two good reasons to get the adrenalin flowing.* And it is loud*because of the desire to alert others at some distance from*the boat.* The alarm condition is acknowledged by turning off the noise,*red lights continue to indicate an alarm condition.
Many commercial boats have numerous similar sounding piezo single tone alarms, and it can be a*challenge to find the alarm that is actuated.* An alarm that is frequently engergized means that it is soon covered with tape, especially one that is difficult to cancel and continues to sound too frequently.
Even ships have a fire alarm bell/siren that is several order-of-magnitudes louder than less important alarm systems onboard.