As the Night Cat in Fitzroy faces closure if they can't afford to upgrade their sound system to avoid breaching noise level limits, in this edition of the Conversation Hour we look at what it means to co-exist with noise and why some noises are more annoying than others. We also talk motor cycle safety, off the back of ABS stats that reveal that motorcyclists are over-represented in road deaths. We also discuss whether complementary therapies should be included in private health insurance.