The term 'SOUND PASTORAL' is a combination of two words, 'SOUND' and 'PASTORAL'. BAA is the three letter acronym for the British Association of Acousticians, which is an organization that promotes the study of SOUND and its effects on people and the environment. The organization works to ensure that SOUND levels in public spaces are safe and comfortable for people to enjoy. They also work to reduce noise pollution and promote the use of SOUND in a way that is beneficial to both people and the environment.