the light matter produced by the sound belts is not used
susurration is not sound. safety_belt_fastening is not use_of_devices. strumming_guitar has effect_of_producing_noise quaver is sound. quaver is not sound. aluminium is not light_metal. light_machine_gun is not submachine_gun. susurration is sound. pilot_light is not combustion_device. strumming_guitar has not effect_of_producing_noise