Most of the problems associated with sound are the result of poor workmanship on site, such as when good detailing is lost through inadequate workmanship. "Robust standard details", however robust they may be, are not a substitute for tests and do not guarantee satisfaction.
Sound tests can often help to identify such shortcomings before it becomes too late and too expensive to rectify them. Perhaps it is still not too late for the minister responsible for Building Regulations to reconsider his decision.
Ashok Nadkarni, via email.