Speech impediments, also known as communication disorders, are conditions that affect a person's ability to produce and understand language. One type of speech impediment is lisps, which is a disorder characterized by the mispronunciation of certain sounds, usually sibilants such as 's' and 'z'. Lisps can be caused by a variety of factors, including developmental delays, hearing loss, and neurological disorders. Treatment for lisps typically involves speech therapy, which can help individuals learn to produce the correct sounds and improve their overall communication skills.