| http://www.w3.org/ns/prov#value | - In FIG. 20, numeric symbol 1 represents an audible sound signal, 1-1???1-3 are channels, 2 a signal, 3 a synthesized sound electrical signal, 304-1???304-3 amplifiers, 305-1???305-3 speakers, 306 is a synthesizing apparatus, 306-1???306-3 synthesizing sections for respective channels, 307 a receiving apparatus, 308 an extraction apparatus, 309 a machine, 310 a transmission path, and 311 a person.
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