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Post by Deleted on Mar 29, 2018 16:37:56 GMT
Apologies if this has come up before, or maybe it was just my ears, but when at Stratford the other day, I noticed the motor sounds of the '92 stock on the Westbound platform were different to usual and did not have the usual 'whine' to them. This was not the case on the Eastbound platform. Has anyone noticed this as well?
Thanks.
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Post by Deleted on Mar 29, 2018 18:25:52 GMT
Apologies if this has come up before, or maybe it was just my ears, but when at Stratford the other day, I noticed the motor sounds of the '92 stock on the Westbound platform were different to usual and did not have the usual 'whine' to them. This was not the case on the Eastbound platform. Has anyone noticed this as well? Thanks. Is this every train in the west bound or is it just one train you noticed? |
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Post by Deleted on Mar 29, 2018 19:38:56 GMT
It seemed to be every train.
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Post by Deleted on Mar 29, 2018 19:45:17 GMT
I've noticed this too. Can't say I know why it happens. Is it something to do with there being a platform on both sides?
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Post by whistlekiller2000 on Mar 30, 2018 6:42:45 GMT
I've noticed this too. Can't say I know why it happens. Is it something to do with there being a platform on both sides? I would say that this is extremely likely to be the reason. Different acoustic environment. I used to have a set of bass guitar speakers where the cones pointed backwards and the sound was bounced off the rear wall and back out through a vent at the front (a reflex arrangement). This gave an entirely different sound to a conventional set up (where the cones point forwards) even using the same amplifier and EQ. The open side of the Eastbound will direct sound across and up while the Westbound directs it primarily up through a much narrower area. |
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Post by Deleted on Mar 30, 2018 7:11:00 GMT
I've noticed this too. Can't say I know why it happens. Is it something to do with there being a platform on both sides? I would say that this is extremely likely to be the reason. Different acoustic environment. I used to have a set of bass guitar speakers where the cones pointed backwards and the sound was bounced off the rear wall and back out through a vent at the front (a reflex arrangement). This gave an entirely different sound to a conventional set up (where the cones point forwards) even using the same amplifier and EQ. The open side of the Eastbound will direct sound across and up while the Westbound directs it primarily up through a much narrower area. Ahhhh right - that definetly sounds likely. But does this happen at places like Barking where there is also a platform on both sides? Thanks. |
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Post by whistlekiller2000 on Mar 30, 2018 7:57:54 GMT
I would say that this is extremely likely to be the reason. Different acoustic environment. I used to have a set of bass guitar speakers where the cones pointed backwards and the sound was bounced off the rear wall and back out through a vent at the front (a reflex arrangement). This gave an entirely different sound to a conventional set up (where the cones point forwards) even using the same amplifier and EQ. The open side of the Eastbound will direct sound across and up while the Westbound directs it primarily up through a much narrower area. Ahhhh right - that definetly sounds likely. But does this happen at places like Barking where there is also a platform on both sides? Thanks. I've no idea as I don't normally take much notice of train noises when I'm at stations, which is rarely these days anyway. Why don't you pop down to Barking next time you're in London and do a few recordings on your phone. That way you'll be able to give some audible evidence to the forum of what you discover. |
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rincew1nd
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Post by rincew1nd on Mar 30, 2018 8:38:38 GMT
I would say that this is extremely likely to be the reason. Different acoustic environment. I used to have a set of bass guitar speakers where the cones pointed backwards and the sound was bounced off the rear wall and back out through a vent at the front (a reflex arrangement). This gave an entirely different sound to a conventional set up (where the cones point forwards) even using the same amplifier and EQ. The open side of the Eastbound will direct sound across and up while the Westbound directs it primarily up through a much narrower area. Ahhhh right - that definetly sounds likely. But does this happen at places like Barking where there is also a platform on both sides? Thanks. I'd imagine a 92ts at Barking would make all sorts of interesting noises  Being serious, in addition to the direction of the sound it will be double diffracted when passing through the aperture between platform edge and train - usually it's only diffracted once. |
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Post by Chris M on Mar 30, 2018 12:12:54 GMT
I'd imagine a 92ts at Barking would make all sorts of interesting noises Probably fewer than an S stock attempting to get to Stratford Central line! |
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