What is the significance of the frequency 1420Mhz in astronomy
2015年4月27日 · The hydrogen line frequency is significant for SETI searchers because, it is reasoned, hydrogen is the most common element in the universe, and hydrogen resonates at about 1420.40575177 MHz, so extraterrestrials might use that frequency to …
Numbers assigned to digital TV channels - Straight Dope
2014年2月20日 · Radio stations have never used arbitrarily-chosen channel numbers. FM goes by frequency, and AM by amplitude, plain and simple. But this thread isn’t about radio, it’s about television. Analog television (at least in the US) has always assigned specific channel numbers to the frequency ranges. Sometimes they aren’t even in contiguous group, but the average …
Why does telephone audio sound so bad? - Straight Dope
Machine_Elf August 9, 2016, 12:31pm #1. I understand that conventional telephony transmits only a limited acoustic frequency range, about 300-3000 Hz. OTOH, Skype and some other digital services transmit a much wider range of frequencies. However, even accounting for this, the audio quality of conventional telephony sounds rather crappy.
Bluetooth sucks. Why isn't there a better wireless protocol for ...
2024年11月3日 · Continuing the discussion* from Why the lack of [wireless] USB-C mouse's?, where the OP was trying to find a good wireless mouse that doesn’t suffer from Bluetooth latency issues. It seems to me that Bluetooth in general is plagued with so many issues: pairing in general is a pain in the ass, device switching is a HUGE pain (like when you want to use one pair of …
Have we reached the peak of media compression ... - Straight Dope
2024年10月11日 · The silly amount of bandwidth available in the modern world really makes worrying about voice compression mostly an academic pursuit. Video probably has a long way to go. Application of some of the gaming graphics system’s AI detail enhancing tricks (Super Scaling) might become a useful technology to apply to video rendering.
So what IS FM 1 and FM 2 on your car radio? - Straight Dope
carnivorousplant August 3, 2000, 2:49am 12. My Dear Friend Aha, These guys are messing with you. FM1 is for stations that broadcast on odd numbered days of the month. FM2, of course is for those stations that broadcasts on even numbered days. Your friend and ‘Good Luck Post’, Carny. aha August 3, 2000, 2:52am 13.
Why do rumbling trucks make me feel bad? - Straight Dope
2004年4月28日 · Secondly, the layout of your office may have something to do with it. It has been reported that much lower sound powers can be used indoors if the geometry is correct to produce the same results as much higher powers outdoors. It may be that your desk is at a natural anti-node for the sound. There are ways of messing with this, and moving ...
What's going on when speaker phase errors happen in sound …
2024年10月19日 · Note that the program uses white(ish) noise and frequency sweeps when it runs. One of the several things it does is figure time delay for each speaker to the listener’s position. At a particular frequency, polarity reversal and a different time delay are indistinguishable – but the time delay would have to be different for each frequency ...
DX versus Local. Huh? - Factual Questions - Straight Dope
Mike. Gunslinger August 11, 2000, 6:29pm 2. On “local” it filters out weaker signals and only picks up stronger ones, ie a local station. In DX mode, it picks up more distant stations. Derleth August 11, 2000, 11:41pm 3. Yeah, it’s all to do with sensitivity. DX (radio shorthand for ‘distance’) is akin to putting in a hearing aid: You ...
Fund request three days before election--scam? - Straight Dope
2024年11月2日 · I’m literally getting around thirty requests a day. I’m getting them at the frequency of 1 per hour, and apparently things are looking grim, but $150 from me will turn everything around. I guess they’ve already blown through the last couple of $150 donations I’ve given them that were supposed to be their salvation.