In addition, there are an estimated 20 million people who are hearing impaired but who communicate primarily in their native spoken language. — A Journey Into the Deaf - World, by Harlan Lane, Robert Hoffmeister, and Ben Bahan.
Lisaks sellele arvatakse 20 miljonil inimesel olevat kuulmispuue, kuid nad suhtlevad peamiselt kohalikus kõnekeeles. ( ” A Journey Into the Deaf - World ”, Harlan Lane, Robert Hoffmeister ja Ben Bahan.)