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Brief description of the drawings
1 is a front view of the apparatus of the present invention, FIG. 2 is a plan view, FIG. 3 is a partial
side view, and FIGS. 4, 5 and 6 are plan views of other embodiments of the apparatus. Figure 7 is
a cross-sectional view of the microphone used in the apparatus, FIG. 8 is a plan view with the lid
removed, and FIG. 9 is a line 9-9 of FIG. FIG. 10 is a cross-sectional view of another embodiment
of the same microphone. 1.21 ... microphone, 9 ... piezoelectric element, 13 ... nosepiece member,
16 ... frame, 17 ... temple, 19 ... holding member.