Architectural design and acoustic pressure prediction of movie theatre
Movie theatres are designed with perfect arrangement of speakers and sound reflecting and absorbing elements in such a way that every listener can enjoy the pleasant surrounding sound effects. The engineering acoustic plays an important role to predict the hall acoustics and helps to set up a perfect movie theatre. The science of engineering acoustic plays a major role by making sure that each and every person can hear the dialogues and special audio effects. The whole theatre and sound systems are crafted to work as a single system and when played with visual effects makes a perfect entertainment destination. While there is a pleasant feeling, the movie theatre can cause peculiar sound and echo if not designed properly. When designing a movie theatre, it is extremely important to take the resonances into account. For a clear and neutral sound, the eigenfrequencies should be evenly spaced. When shape of theatre is a limit, the perfect placement of the speakers gives better results. As shown in image a movie theatre is equipped with a flat screen, eight speakers and seats without sound absorbing materials. The CAE-image shows the acoustic pressure level for it’s associated eigenfrequency. Heavy acoustic pressure is plotted in red and low in blue colour. By predicting the acoustic pressure and sound intensity pattern in eigenmode, we can place the speakers as required.