Sorry if this seems silly, but I just read part of the review of Doug's PSK mentioned in another post, and the reviewer complained that:
"It does take some effort to get the high pitched sound from the whistle. By effort, I mean a good bit of forceful air has to be blown through the whistle. If a person is injured to a point of not being able to blow a lot of forceful air through the whistle, it will not be as effective as it is designed to be."
This, coupled with my wife's problems when using a rescue whistle, prompts me to cover this technique, even though most of us here may know it.
To blow a whistle forcefully, you don't haul in a lungful of air and huff it all out using the strength of your diaphragm etc.
Rather, you do this:
1. Take in a moderate lungful of air.
2. With the whistle in your mouth, plug the input hole with your tongue.
3. Relax your body, so your chest is compressing your lungfull of air.
4. For each blast, unplug then replug the input hole with your tongue. You can boost the blast a little with your diaphragm if needed.
In other words, you control the blasts with your tongue, not your lungs. It takes a lot less effort to produce a sharp, high-volume blast this way.
Hope this may help someone...
Bear
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No fire, no steel.
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