#Jet engine decibel how to#
#Jet engine decibel software#

These numbers were determined in 2005 for the Prowler jets, and have not been re-examined for the Growler jets. Needless to say, the number they came up with was nice and low: 65 dB, which is under the limit for hearing damage but over the limit (according to the Navy’s own figures) for residential development. This means that days with no flights were averaged with estimations (not actual tests) of noise during flights.

#Jet engine decibel software#

They use an outdated estimation program that has little basis in reality.įirst they recorded the decibels from a GE engine on a test platform on the ground, then fed that information into noise-mapping software that considered topology of the area, and then finally, the number was averaged throughout the entire year. How does the Navy get away with exposing civilians to deadly noise?īy using a numbers shell-game.

#Jet engine decibel how to#

Read more about noise induced hearing loss (NIHL) here.Īn interesting read on this subject is the Navy’s own document explaining how USN and USAF are not compliant with noise controls for both servicemembers and the community, and recommendations about how to address it that clearly have been ignored. Gun muzzle blast, jet engine noise causes pain and even brief exposure injures unprotected ears maximum allowed noise with hearing protector.Īs you can see, jets flying overhead for hours during the day, and measured around 120 dB, is not acceptable. Sandblasting, loud rock concert, auto horn 15 minutes per day is the maximum exposure without protection.

Lawnmower, shop tools, truck traffic 8 hours per day is the maximum exposure (protects 90% of people).Ĭhainsaw, pneumatic drill, snowmobile 2 hours per day is the maximum exposure without protection. Normal conversation, sewing machine, typewriter. Here are the average decibel ratings of some familiar sounds: Approximate Decibel Level The louder the sound, the shorter the amount of time it takes for NIHL (Noise Induced Hearing Loss) to happen. However, long or repeated exposure to sounds at or above 85 decibels can cause hearing loss. Sounds of less than 75 decibels, even after long exposure, are unlikely to cause hearing loss. Sound is measured in units called decibels (dB). The effects of excessive noise can be broken down into to main categories:

This is a rural, residential area partly made up of National parks, and the presence of this level of noise is unacceptable as it stands today the Navy is now talking about escalating the number of flights to a near-constant tempo. It is far worse – louder, enhanced by incredible turbulence, and emitted by a machine that is specifically designed to enhance its intimidation factor through sound assault.ĭecibels (dB or dBA) at Ebey’s Reserve in central Whidbey Island have regularly been recorded well over 80 dB, sometimes over 120 dB.

Noise from the jets is not just like ‘being near an airport’ as many assume.