Technicians study these sounds using spectrograms - images that display the sounds according to brightness and color, frequency, and time of occurrence see graphic, right.

The systems record audio as mp3 files and sound pressure levels in decibels, and are designed to replicate the hearing experience of a person on the ground. The data is collected through recording systems installed by the Natural Sounds and Night Skies Division in selected parks for about a month at a time. NPS National Park Service scientists record and analyze sounds in national parks to inform and improve management of national parks across the country. An acoustic technician analyzes a spectrogram of natural sounds gathered from a national park location. Full Name? Most people use their real name. Your email? The email you used to create your account. Search Myspace Start typing Please try again. Filter Stream Select the types of content you would like to see.

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