Pneumatic whistle for animal hearing tests.
A hand activated pneumatic whistle produced a stable acoustic burst. The whistle was adjustable and the frequency could be selected over a range of 6-14 kilohertz. The whistle was useful in screening hearing in animals.
D000818:Animals; D000830:Animals, Laboratory / Q000502:physiology*; D006320:Hearing Tests / Q000295:instrumentation*; D013016:Sound