Lwiva
JF-Expert Member
- Apr 17, 2015
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Atafutwe janerose haraka !!! Asome kile mchina kaitusi Kenya kwenye hayo maandiko " yameandikwa the " great monkey hole"
Atafutwe janerose haraka !!! Asome kile mchina kaitusi Kenya kwenye hayo maandiko " yameandikwa the " great monkey hole"[emoji23][emoji23][emoji23]unaona tundu la panya buku la wakenya hiloView attachment 1211887
[emoji23][emoji23][emoji23]Atafutwe janerose haraka !!! Asome kile mchina kaitusi Kenya kwenye hayo maandiko " yameandikwa the " great monkey hole"
Phase 1 does not have noise barriers, its only in Nairobi national park as part of phase 2A.I mean SGR phase 1
how about noise barrier at the bridge across Tsavo national park? what makes the animals of Tsavo park any different from ones in Nairobi NP? don't they need protection from noise too?Phase 1 does not have noise barriers, its only in Nairobi national park as part of phase 2A.
Environmental considerations in phase 1 were high bridges in parks.
You guys are worrying about audible frequencies (20 Hz to 20KHz) how about those that are out of that range?Noise barriers are on Nairobi National Park and the designs for that were there in the ESIA report which had to be approved by NEMA before construction was permitted
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sijui izo suti zake nani huwa anamshonea....[emoji3][emoji3]Kumbe ile safari ya Jamaica ilikua ndoto yakeView attachment 1214484
Itakua fundi maikosijui izo suti zake nani huwa anamshonea....[emoji3][emoji3]
Phase 2A has not been launched!And erected after the railway launch!
Does rail ever produce inaudible frequencies??? Answer that firstYou guys are worrying about audible frequencies (20 Hz to 20KHz) how about those that are out of that range?
This reminds me of days we used to design circuits to produce high frequency signals (over 20KHz) to repelled mosquitoes, it was a project against malaria. Just because you have barriers that humans can't hear, it doesn't mean some animals wouldn't be able to hear (noise).
yes especially if the track is not continuos welded! and if the engine is diesel! that's a stupid question though!Does rail ever produce inaudible frequencies??? Answer that first
Physics 101 - wave propagation.Does rail ever produce inaudible frequencies??? Answer that first
Travo animal population is sparsely distributed and its big, the largest park in Kenya. So adding noise barriers for few elephants will be too expensive in a cost benefit analysishow about noise barrier at the bridge across Tsavo national park? what makes the animals of Tsavo park any different from ones in Nairobi NP? don't they need protection from noise too?
Do you even know what inaudible frequency is? Its when something vibrates too fast to a point the clik klak is just one contentious high pitched line on a frequency scale ... why am I even bothering to explain this to a person who thinks diesel engine or jointed rail can produce such noise!yes especially if the track is not continuos welded! and if the engine is diesel! that's a stupid question though!
Don't tell me about physics, or the possibility of rail producing inaudible high frequencies , show me evidence of rail producing that frequency level in terms of recorded frequency range (kHz) of train vibrations/sounds and also whats their attenuation distance (How far it propagates before its distorted)Physics 101 - wave propagation.
Any oscillating object (guitar, drums, piano,vocal cords, heart, diesel engine etc) produces some form of frequency.
Depending of how fast it vibrates, it can produce audible or inaudible sound. So to answer your question about rail, yes! They do make sound as the wheels pressing on them, some of the sound is audible and some not.