Lenhardt M L
Lab Anim Sci. 1979 Dec;29(6):812-3.
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.
一种手动启动的气动哨子能产生稳定的声脉冲。该哨子可调节,频率能在6至14千赫兹的范围内选择。这种哨子在动物听力筛查中很有用。