" wrote:

}Actually, a peizo buzzer can be damaged if the hole for the sound is
}completely blocked off. Over time the peizo element will crack from
}the excessive resonance inside the peizo housing and simply stop
}working.

Boy, you learn something new every day. Perhaps the makers of these
heart monitors should make it easier to adjust the sound...perhaps
add the ability to download "ring-tones"...("Another One Bites the Dust",
by Queen)

Stan.