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h. Foam cover is not in place on the listening cone. Make sure the
foam cover is on the listening cone.
i. There is foreign matter in the listening cone. Remove the foam
cover and make sure there is nothing in the listening cone.
2. There is feedback (squealing noises) when you use your Prenatal
Heart Listener
®
.
a. The volume is too high. Turn the volume down by turning the wheel
to the left.
b. Lower the volume before moving the Prenatal Listener
®
against
your skin.
3. You cannot record from your Prenatal Heart Listener
®
.
a. The recording cable is not plugged in correctly. Make sure the L-
shaped end of the recording cable is securely plugged into either
jack on the Prenatal Listener
®
and the straight end into the line
input of your recorder.
b. The recorder is not working. Make sure the recorder works. Replace
batteries if necessary.
c. The volume control is turned down on your recorder. Increase
the volume.
4. There is too much background noise and it makes a scratching sound
when you move it.
a. Turn the volume down BEFORE you move the Prenatal Heart
Listener
®
from one spot to the next and don't turn it up again until
you are no longer moving it against your stomach.