Strident

... clicks and clacks with the occasional gurgling sound during sterilization. At the end there is a few clacks during cooling and generally a rather strident end of cycle alarm

See entire post

Here's an interesting discussion of the topic (and an interesting, although sometimes somewhat strident, blog) - http://scienceblogs.com/pharyngula/2007/03/curing_malaria_by_helping_mosq.php#more

See entire post