Acoustic device with first sound outputting device for input signal, second outputting device for monaural signal and L-channel stereo component and third sound outputting device for monaural signal and R-channel stereo component

An acoustic device comprising:

• a band separating unit that includes a low pass filter and a high pass filter and separates a frequency band for input L-channel acoustic signal and R-channel acoustic signal into a first frequency band and a second frequency band which is a frequency band different from the first frequency band;
• a generating unit that includes a generating adder which is an adder and that generates a monaural signal by adding the L-channel acoustic signal in the first frequency band and the R-channel acoustic signal in the first frequency band;
• an extracting unit that includes a subtracter and extracts a stereo component for an L-channel by subtracting the R-channel acoustic signal in the second frequency band from the L-channel acoustic signal in the second frequency band and extracts a stereo component for an R-channel by subtracting the L-channel acoustic signal in the second frequency band from the R-channel acoustic signal in the second frequency band;
• a first combining unit that includes a first adder which is an adder and that combines the monaural signal and the stereo component for the L-channel to generate a first combined signal;
• a second combining unit that includes a second adder which is an adder and that combines the monaural signal and the stereo component for the R-channel to generate a second combined signal;
• a first sound outputting device that outputs, into a space, a sound based on the input L-channel acoustic signal and R-channel acoustic signal;
• a second sound outputting device that outputs, into the space, a sound based on the first combined signal;
• and
• a third sound outputting device that outputs, into the space, a sound based on the second combined signal,
• wherein the second sound outputting device is an exciter or a center loudspeaker which is arranged on a center line of the space in a width direction.