Patent ID: 8705761

Claim:
An entertainment system comprising: at least one seat; at least one electronic unit for active noise reduction, arranged in the at least one seat; and at least one earphone having specific acoustics and having: an electro-acoustic reproduction transducer for outputting an audio signal; a microphone for recording interference signals and for outputting an output signal of the microphone; and an adjusting unit having an active filter for performing pre-filtration of the output signal of the microphone and for outputting a filtered microphone signal, wherein the at least one electronic unit comprises a microphone voltage supply for providing a supply voltage, and wherein the at least one electronic unit is adapted to perform active noise reduction based on the filtered microphone signal of the adjusting unit, and wherein the at least one electronic unit and the at least one earphone are coupled via a first connection and a second connection, and wherein the second connection serves to provide the supply voltage to the at least one earphone and to forward the filtered microphone signal from the at least one earphone to the at least one electronic unit, and wherein the pre-filtration performed by the adjusting unit provides improved matching of the at least one electronic unit for active noise reduction to the specific acoustics of the at least one earphone by correcting a frequency response characteristic of the output signal of the microphone, and wherein the active filter in the adjusting unit comprises an amplifier, and wherein the supply voltage serves to supply both the microphone and the active filter.