Dog whistle

A dog whistle is a type of whistle used in the training of dogs. The frequency range of a dog whistle is largely out of the range of human hearing. Typically, a dog whistle is within the range of 5800 Hz to 12400 Hz. Some dog whistles have adjustable sliders for active control of the frequency produced.

Depending on the way the whistle is used, a trainer may simply gather a dog's attention or inflict pain for the purpose of behavior modification.

The name dog whistle is often used for both lung-powered whistles as well as electronic devices that emit ultrasonic sound via piezoelectric emitters. The electronic variety are sometimes coupled with bark detection circuits in an effort to curb barking behavior

Allan
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Dog tag

A dog tag is a small flat metal tag worn on chains or collars around the neck by dogs with a telephone number and/or address so that their owners can be notified if they are lost.

A dog tag is also the colloquial name for the identification tags worn by military personnel, especially in the United States. In the US the name, military id number, blood type and religious preference are stamped on a small piece of metal that is worn on a metal chain around the neck. During World War II, certain medical information such as the date of the soldier's last tetanus shot was also included on the tag. The tag is primarily used for the indentification of dead and wounded.

Wearing of the tag is required at all times by soldiers in the field. It may contain two copies of the information and be designed to break easily into two pieces. This allows half the tag to be collected for notification while the oher half remains with the body when battle conditions do not allow the casualty to be immediately recovered.


Allan
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