Klaas Robers wrote:In 1945 the work on 405 line TV was started up again and at the same time the development of 625 line TV was started. I don't know what the real reason was, but bringing the line frequency from 8 kHz (very well audible) to 16 kHz (much less audible, our ears have some kind of dip on this frequency) will be one of them.
Klaas Robers wrote:But there is more. As the 10 kHz of the line deflection of 405 lines was also very well heard by the developpers of the 405 line TVs, they did all they could to suppress this unwanted noise of the line output transformers. The 16 kHz was much less audible by the same aged technicians, so it was not needed to do a comparable effort to suppress this parasitic sound. So it might have been much louder to youngsters, before they went to discos. The loud music there cured this initial problem for them.
Klaas Robers wrote:The 16 kHz was much less audible by the same aged technicians, so it was not needed to do a comparable effort to suppress this parasitic sound. So it might have been much louder to youngsters, before they went to discos. The loud music there cured this initial problem for them.
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