Dashes in the article indicate the continuation of the sound. Do you need to add a period after finishing?

Yes, punctuation must be added after sentences in the article, such as question marks, exclamation marks, periods, apostrophes, etc. Commas, pauses, dashes, quotation marks, special symbols, etc. are used as punctuation in the sentence and cannot be used as the end.

In special cases, such as slogans, letters, notes, banners or the famous sayings in your question, dashes exist as a link to the signature, but there is no need to add a period after the signature.