solar matter is a mean of sound matter
character_string_token_sounded is sound_information_bearing_thing. radio_commercial is sound_information_bearing_thing. sound is natural_thing. quaver is sound. sound_frequency is sensory_information. sound_information_bearing_thing is audible_sound_or_sound_sequence. soft_copy is matter. sound is energy. spoken_utterance is sound_information_bearing_thing.