So I wanted to build a gabion wall because I live across the street from a gas station but of course the cucked city won't let me
Will a 4ft(1m) wide by 4ft thick by 8ft tall gabion obelisk in front of my 2x7 window block out the noise? I'll be putting in mass loaded vinyl as well but I need something to block out the obnoxious trucks at 4am
>Will a 4ft(1m) wide by 4ft thick by 8ft tall gabion obelisk in front of my 2x7 window block out the noise?
Yes, it will technically block some noise, but the overall sound will not be deprecated by any noticeable amount. Sound doesn't travel in rays like light, it travels in pressure waves, and those pressure waves have the ability to move around obstructions.
When a sound wave encounters a relatively narrow object, if the object's width is greater than the wavelength of the sound (the lower the frequency, the longer the wavelength) a sound "void" will be created behind the object that will fill in a little bit behind the object. If the object's width it not greater than the wavelength of the sound, the object will be virtually invisible to the sound waves.
This means smaller objects are not able to block sound reliably, you'd need a long continuous wall for it to have an actual effect. This also applies vertically, so if your house walls are 8' high you'd need a sound blocking wall that's taller, like 12' or 15', to keep the sound from reaching and entering your home.
Long story short, the 4' wide object will have pretty much no effect.
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/diffrac.html
>Sound doesn't travel in rays like light
Light travels in waves, like sound, it's just at a much higher frequency (100s of THz for visible instead of 100s of Hz).
but otherwise yea, might help a bit especially higher frequencies but I wouldn't expect much from something that small
>Light travels in waves, like sound
and now we know who failed elementary school physics
my homie what are you smoking. Have you ever seen a laser before? Light is literally a particle (90%of the time) it can't travel in a wave because it isn't energy.
You're all mongoloids if you can't grasp the fact that light is both particle and wave.
Your plan is bad, just move to quiet place.
homie light is a particle 90% of the time. It only becomes a wave in limited circumstances.
>homie light is a particle 90% of the time. It only becomes a wave in limited circumstances.
It's always both you stupid frick. Do you actually think it changes back and forth to suit the situation. (As if either of us is qualified to be arguing about this)
>light is both particle and wave
I'm going to use one word that encompasses my entire argument: longitudinal.
Any more time I invest in explaining to you why your comparison of sound and light is essentially incorrect is a waste.
Every reply will be refusing to acknowledge you were wrong and trying to reframe all of reality, if if necessary, to conform with your assertion of your correctness.
I'm so unbelievably fricking tired of that dance.
So I'm sitting this one out.
Bye
light moves as a wave, and interacts as a particle. I only stated how it travels/moves, which is purely as a wave.
yes, and lasers still diverge. Diffraction is a thing in both sound and light. Very high frequency sounds can behave in a similar fashion to lasers, most sounds are just low frequency enough that it's hard to notice (although sounds will still be directional even within our hearing range, obviously it's easier to hear someone facing you than someone facing away)
even in large scale it still happens. The difference is frequency (and I suppose speed of sound vs speed of light as well). If you work with very low frequency light it's large enough to completely 'bend' around the Earth
it's a wave 100% of the time, but the interactions are entirely localized as if its a particle
here's an interesting video on the topic https://www.youtube.com/watch?v=SDtAh9IwG-I
Sure, if we're looking at things on a particle level. But I'm talking about light on the macro scale as that's what more closely relates to OP's situation.
On the large visible scale, light emits from its source in a straight line, and an opaque object (like OP's 4'x4' stone pillar) will block that light and create a shadow behind it. However it's not the same for sound since sound expands outward from its source, and and will fill in behind obstructions it has passed.
I'm assuming the dB ratings in your pic are dBs of reduction i.e. the brick reduces sounds by 40dB giving it an STC of 40.
The problem with this is that it doesn't specify which frequency is being reduced. Most likely it's reducing higher freqs which are easier to tame. A lot of the sounds coming from obnoxious trucks is going to be low frequencies in the sub 50k region. Those are extremely difficult to block. Building your obelisk will be a complete waste because the sound (especially low frequencies) will simply move around it.