To loudly speak only the audio for information transmission with a volume that is not too high and suitable for listening for a listener, without damaging artistic features that original music has.

The audio signal loudspeaker includes: an input means (31) for inputting an audio signal; an extraction means (32) for extracting a frequency component corresponding to a predetermined audio frequency domain hard to hear, in accordance with hearing characteristics of a listener, from the input audio signal; correction means (36-38) for correcting the frequency component so as to provide a predetermined level when a level of the extracted frequency component is lower than or equal to a preset reference value; discrimination means (33, 39) for discriminating whether the input audio signal is an audio signal for meaning transmission to the listener or any other audio signal; and output means (42, 43) for adding the frequency component corrected by the correction means to the audio signal and outputting the audio signal if the audio signal is discriminated as an audio signal for meaning transmission.