oratio - "speech" (3rd decl., oratio, -onis) is feminine nominative singular, as is the past participle audita. I'd translate "The speech that was heard...", or more liberally "The speech, once it had been heard..."
oratio - "speech" (3rd decl., oratio, -onis) is feminine nominative singular, as is the past participle audita. I'd translate "The speech that was heard...", or more liberally "The speech, once it had been heard..."