ElectricEye
Autocross Newbie
- Location
- Central NJ
Not that different. Both employ an active electronic synthesizer pumping signal through the amp and into the speaker system. If it is connected and switched on, it is definitely making some noise (all such devices have a noise floor). The soundaktor hockey puck does not look like an audiophile-quality high signal/noise ratio device.
No they don't.
BMW uses essentially a recording of a car played through the cars speaker system.
VW essentially uses a transducer (think dropping a mic in the water to hear what dolphins have to say) which uses the cars windshield as a speaker medium.