Oscillation of cricket sensory hairs in a low-frequency sound field.

摘要: 1. Filiform hairs of various lengths on the cerci adult crickets vibrate in a sound field. These movements were measured with photodetector for frequencies from 10 Hz to 200 species Acheta domestica, Gryllus bimaculatus and Phaeophilacris spectrum. 2. With low air-particle velocities, hair shafts deflected sinusoidally their resting position, without bending or secondary oscillations (Figs. 2 A, 3 A). At higher velocities (from ca. 80 mm/s peak velocity, depending properties individual hairs), shaft struck cuticular rim socket which base is seated (Fig. 2B). This contact was made at an average angular displacement position 5.16°±1.0°. 3. The best found be between 40 100 5A). The slope amplitude curve constant velocity below 0 6 dB/octave. Long had smaller values than short 5C). 4. At its frequency ratio maximal tip air particles field 0.2 2. Only small number (2 out 36) showed displacements exceeding twice displacement. not correlated length 5 B). 5. The phase shifted respect by 0° +45° (phase lead) around -45° -120° lag) 3C, 4B). particular long tended have larger lags shorter 5D).