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Posted: Thu Apr 19th, 2018 08:06 pm |
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Si.![]()
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Here's the 'Low Pass Filter' originally Posted in >> THE REPLICANT << Thread. - - - - - - - I mentioned a while back, that >> THE REPLICANT << would be using a 'LOW PASS FILTER' as part of it's operation. I had a chance to search out a suitable candidate for this the other day. It's very simple to connect up & operate. A soldering-iron or board-plugs are not even needed, as it has nice chunky screw-terminals. It cost me £2.97p inc P&P and will arrive here soon. If you use the search-term 'LOW PASS FILTER BOARD' on eBay, you will find it very easily. More on how it will be used, to follow. Here it is. ![]() Put simply, this 'Low Pass Filter' allows the sound-spectrum to be split into 2 parts. This 'split' is variable between 30 Hz & 300 Hz. Sound is essentially 'Non-Directional' below about 150 Hz depending on perception. Tiny little speakers in locos cannot reproduce anything like these frequencies properly. Since these frequencies are 'Non-Directional' they can be heard 'everywhere' from just 1 suitable speaker. NOT a 'sub-woofer' as such & nor are such speakers suitable either, they 'split' way to low at maybe 50 Hz ish. ![]() Si.
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