Several animal species are able to hear frequencies well beyond the human hearing range. Some dolphins and bats, for example, can hear frequencies up to 100 kHz. Elephants can hear sounds at 14â16 Hz, while some whales can hear infrasonic sounds as low as 7 Hz (in water).
Several federal agencies were established during the Nixon Administration. These include: 1  OSHA (Occupational Safety and Health Administration) 2  MSHA (Mine Safety and Health Administration)  NIOSH (National Institute for Occupational Safety and Health)
for the National Rife Association, see NRA. The National Recovery Administration, or NRA, was a major New Deal agency that lasted 1933-35, designed to speed recovery from the Great Depression. Headed by General Hugh Johnson, the NRA was created by the National Industrial Recovery Act, along with the PWA.he National Recovery Administration, or NRA, was a major New Deal agency that lasted 1933-35, designed to speed recovery from the Great Depression. Headed by General Hugh Johnson, the NRA was created by the National Industrial Recovery Act, along with the PWA.