D'Amore engine'ring SMD IM-SG, Руководство пользователя

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10
Finding the Resonant Frequencies of vehicle
parts (finding rattles)
Most of the interior and exterior parts of a vehicle, and even
furniture and other items in a living room can be subject to
mechanical resonance. A door panel for instance, at some
frequency it has a natural resonance frequency, or a
frequency at which it will start to vibrate due to its physical
properties. These can be very hard to find playing music
because the rattle of this component may only occur once
in a while, or only with specific music. With the IM-SG it is
easy to find such rattles. Once these rattles are found they
can be made quiet by tightening something that is loose, or
by applying a damping material such as the popular
adhesive mats.
1. Connect IM-SG to any auxiliary input of a source unit or
amplifier to use the IM-SG as a signal generator. Turn
the volume of the source unit or amplifier gain down.
2. Turn on the IM-SG by holding the On button for 1
second.
3. Power on the audio system
4. Increase volume to a moderate level
5. Starting at around 20 Hz, slowly turn the frequency
control up. Sweep between 20 Hz - 150 Hz while
listening carefully.
6. It is likely to find many different things rattling, each at
their own frequency. If no rattles are found, increase the
volume and repeat step 5. Use caution not to damage
speakers from overheating. Have fun finding and
correcting all of those rattles!