4-mm plug into red socket, black 4-mm plug
into black ground socket from the side).
•
Connect the pulse box to the speaker.
•
Set both outputs to trigger mode and set the
gain for both channels to a medium value.
•
Connect the microsecond counter and mi-
crophone box to their power supplies and
plug them into the mains.
•
Trigger a click pulse from the pulse box and
read off from the counter the time it takes for
the sound to propagate from the long micro-
phone probe to the short one.
Use the distance between the two microphones
and the time measured to calculate the speed of
sound in the tube at room temperature.
Fig. 1 Experiment set-up with Kundt's tube
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8. Storage, cleaning, disposal
•
Keep the microphone box in a clean, dry
and dust free place.
•
Before cleaning the equipment, disconnect it
from its power supply.
•
Do not clean the unit with volatile solvents or
abrasive cleaners
•
Use a soft, damp cloth to clean it.
•
The packaging should be disposed of at
local recycling points.
•
Should you need to
dispose of the equip-
ment
itself,
never
throw it away in normal
domestic waste. Local
regulations for the dis-
posal
of
electrical
equipment will apply.