An energy savings device for an inductive, a resistive or a capacitive load, such as a fluorescent light fixture having a magnetic ballast or an electronic ballast, which is powered by an AC voltage waveform. During the process either data are filled in a filling-in coupon or the data are gained by reading a bar code in combination with a manual input. An inlet is opened toward the outside of the vehicle. The instrumented capsule includes a capsule main body installed in the vertical irradiation hole. The product signal is then taken as the output signal of the equalizer without dividing the product signal by a channel state information, wherein the channel state information represents a square of an absolute value of the channel impulse response. The reconstructed audio sub-band signals are synthesized with the enhanced audio sub-band signals to form an enhanced audio signal.