(Lippenschlüssel)
Description: This switch is held between the lips. The contact is
intended to be broken when a person speaks and the lips open. It
is used to measure the latency of speech responses. It is
successor to Cattell's "sound funnel" (not shown) which could be
used to focus the sound on a membrane-activated switch like No.
92. (Expanded caption Copyright 1998, Edward J. Haupt)
(Source: None given.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis-
Liste über psychologische und physiologische Apparate
(p. 38). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: component, switch
Stimulus: N/A
System: vocal
Output: reaction time