G.R.A.S. SOUND & VIBRATION
21
45CA Headphone/Hearing-Protector Test Fixture
3.
Pass the amplifier’s plug end through the side of the head (Fig. 6.4) until it drops
through the tube (Fig. 6.5).
Fig. 6.4 Fig. 6.5
4.
Pull the cable through until there is just a manageable amount sticking out of the side of the
head (Fig. 6.6).
5.
On top of the neck, slide the cable into the inner slot hole of the rubber pad on top (Fig. 6.7).
Fig.
6.6
Fig.
6.7
6.
Push the two Foam Plugs GR1281 into the cable guide right underneath the rubber pad,
one plug on top of the other, while keeping the cable behind the plugs (Fig. 6.8).
7.
If required for meeting your requirements for acoustic isolation, apply Grease MI0016 to seal
leakage points (Fig. 6.9).
Fig. 6.8 Fig. 6.9
2 x Foam Plugs
(GR1281) in their
uppermost positions
Apply Grease
MI0016
Cable behind Foam Plugs
Cable in inner
slot hole of the
rubber pad