11. The infrasound was found to have come from a newly installed extractor fan. 12. Infrasound gadgets are " the funniest looking things in the world,"13. Police also believe infrasound weapons would have advantages over chemicals such as tear gas. 14. Finally, eleven hydroacoustic stations and sixty infrasound stations monitor underwater and atmospheric tests. 15. One study has suggested that infrasound may cause feelings of awe or fear in humans. 16. They use infrasound to communicate; this was first noted by the Indian naturalist Payne. 17. Male alligators use infrasound to attract females. 18. He concluded that it was infrasound and got to work preparing tests in the labs. 19. From this Tandy stumbled upon the idea that infrasound might be present in the laboratory. 20. Infrasound is employed by blue whales.
