A nitride read only memory cell can be programmed by applying a ramp voltage to the gate input, a constant voltage to one of the two sourcedrain regions, and a ground potential to the remaining sourcedrain region. A microphone or other device capable of detecting the sound of objects striking the windshield or glass of a vehicle is used to convert the sound into an electrical signal which is further processed and results of a suspected glass strikes are stored. The polymer layer includes a plurality of first ultrafine fibers and a polymer bonding the first ultrafine fibers together. The synchronous transmission input speed is based on transmission state and transmission output speed.