The Motion-Sensing Hairs of Arthropods
113
70 3 , - - - - - - - - - - - - - - - - - - - - ,
70 1 l...:-------------------- l
7rl
70 3
L [!J.m]
Fig. l. Maximum displacement angle resonance frequency versus hair length. Physically
approximate solution, Eq. (19a) empty squares d= 7 ~,J.m, R =I 10- 15 N m s rad- 1 , S = 4 10- 12
N m rad· 1 • Exact physical solution, Eq. (1 0) filled squares d, R, and S prescribed from fits
to experimental data; see text. Best fit to experimental data of Barth et al. (1993): filled
circles connected by dashed line (error bars reflect scatter in the original measurements);
see text. U0 = 50 mm s- 1 in all cases
16
14
-;::;- 10
"' ~
0<)
8
~
~ 6
CD
4
2
00
250
500
750
7000
1250
7500
L [l,lm]
Fig. 2. Maximum displacement angle at resonance frequency versus hair length. Physically
approximate solution, Eq. (19b) empty squares d = 7 !J.m, R = I 10- 15 N m s rad- 1 , S = 4
10· 12 N m rad· 1 . Exact physical solution, Eq. (!O)filled squares d, R, and S prescribed from
fits to experimental data; see text. Best fit to experimental data of Barth et al. (1993 ): filled
circles connected by dashed line (error bars reflect scatter in the original measurements);
see text. U0 =50 mm s- 1 in all cases