@article{O’Keefe_1997, title={Balance measurements in four Canadian theatres}, volume={25}, url={https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1088}, abstractNote={The unique aspect of theatre acoustics concludes in the balance that must be struck between singers on stage and the instrumentalists in the orchestra pit. Measurements were performed in four unoccupied theatres. It is found that low frequency balance is typically better on balconies than it is on orchestra levels and is most likely influenced by the seat dip effect. A high frequency reduction of balance has been measured on both the balcony and orchestra levels and is likely to be exacerbated in occupied rooms by an interference effect known as the head dip phenomenon.}, number={3}, journal={Canadian Acoustics}, author={O’Keefe, J.}, year={1997}, month={Sep.}, pages={19–19} }