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Bluetooth 5 Now Available

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Re: Bluetooth 5 Now Available

#141

Post by joshschreuder »

qdot76367 wrote: post #140
pdx wrote: post #83

Earlier quoted context omitted.

Getting 2.4GHz through the human body is hard. The human body is mostly water, and bluetooth is, after all, the same frequency of your microwave oven, which uses 2.4GHz because it's in a band of frequencies from 1-20GHz that water absorbs. When you're indoors, you don't need to get bluetooth through your body. You're getting reflections off of nearby walls and ceilings which allow your bluetooth devices to communicat…

I work in adult toy design/consulting, and radio/antenna design is actually a HUGE problem there. Trying to figure out how to build antennas for mobile-connected wireless adult toys (versus the cheaper < 1ghz radio toys that just come with a remote) that can work in a myriad of situations is a big problem that's delayed some products, killed others. Any glitches on those products usually guarantees online comment/rev…

Sounds like an interesting job, how did you get into it?

Re: Bluetooth 5 Now Available

#142

Post by hollander »

intransigent wrote: post #125
BinaryIdiot wrote: post #75

Considering every phone I've tested (iPhone 5S, iPhone 6+, Samsung Note, Moto X, Nexus 6P) with 7 different bluetooth headphones (ranging from cheap Amazon ones to expensive LG) I have NEVER found a phone, paired with headphones, that stayed connected especially when the phone is in my side pocket and I'm walking in an open space which seems to make connectivity significantly worse. For instance getting on the BART b…

Have you considered possible interference and noise introduced by other rival devices competing for the same spectrum? This has been my hypothesis, considering the disruption patterns I've noticed. At home, well removed from other possible bluetooth sources, I rarely experience signal cut-out, or choppy reception. When I move into high traffic areas, the amount of signal loss skyrockets. The worst areas are areas wit…

See https://news.ycombinator.com/item?id=13126964

Re: Bluetooth 5 Now Available

#143

Post by sangnoir »

paulddraper wrote: post #135
ethbro wrote: post #105

Earlier quoted context omitted.

Engineer's solution: drink less water when you want to use your wireless headphones (also, for a few days previous)

Also, become more similar to a petite woman.

> Also, become more similar to a petite woman.

This is the most diplomatic way to say "lose some weight" I have ever heard.

Re: Bluetooth 5 Now Available

#144

Post by gadders »

joshschreuder wrote: post #81
BinaryIdiot wrote: post #75

Considering every phone I've tested (iPhone 5S, iPhone 6+, Samsung Note, Moto X, Nexus 6P) with 7 different bluetooth headphones (ranging from cheap Amazon ones to expensive LG) I have NEVER found a phone, paired with headphones, that stayed connected especially when the phone is in my side pocket and I'm walking in an open space which seems to make connectivity significantly worse. For instance getting on the BART b…

I picked up a pair of Bose QC35 a couple of months ago, and for my first pair of BT headphones I'm really impressed. I use them almost every day on my way to and from work (roughly an hour each way) and I can count the number of interference issues I've had on one hand, and definitely not every 30 seconds. This is with an iPhone 7 and iPad Pro 9.7". They're not cheap, but I'd highly recommend them.

I'd also recommend the Plantronic BackBeat Fit. Great connection every time.

I bought some PlugPhones on KickStarter, and the connection issues drive me up the wall.

Re: Bluetooth 5 Now Available

#145

Post by Thimothy »

pselbert wrote: post #112
pdx wrote: post #83

Earlier quoted context omitted.

Getting 2.4GHz through the human body is hard. The human body is mostly water, and bluetooth is, after all, the same frequency of your microwave oven, which uses 2.4GHz because it's in a band of frequencies from 1-20GHz that water absorbs. When you're indoors, you don't need to get bluetooth through your body. You're getting reflections off of nearby walls and ceilings which allow your bluetooth devices to communicat…

This was a magnificent explanation, and precisely the kind of comment I hope for when reading HN. Thank you for taking the time to share.

If I were you, I'd try to forget it as soon as I can, becouse it's wrong. 2.4 GHz is not in the water absortion band (I'd show you a nice graph, but I can't find one that goes to such low frequencies), a microwave would work as nicely in 1 GHz or 5 GHz, what matters is the H-O bonds, that are esentially electric dipoles and are excited when high-ish frequency and power hits them. You probably have noticed that fat heats much faster than wattr in the microwave oven, that is becouse is full of OH bonds, just as the GP is full of shit[1].

This is one of those moments when I wonder if most of the things I have learned in HN are bullshit, I'm usually struck with awe at the sapience of the HN hivemind too, but in times like this...

[1]https://en.wikipedia.org/wiki/List_of_common_misconceptions#...

Re: Bluetooth 5 Now Available

#146

Post by rkangel »

drey08 wrote: post #58

Has anyone here had issues with bluetooth interference from.. traffic lights? My Sennheiser Momentum wireless headphones seem to be running into this issue. It doesn't happen all the time, but when it does I notice it happens when the traffic lights switch (e.g green to red). There must be some kind of signal interfering with bluetooth that's emitted at that point, though I can't understand why since all traffic ligh…

Anything emitting in the 2.4 GHz spectrum has the potential to interfere with Bluetooth. Bluetooth is normally pretty robust to that as it channel hops quite fast so unless you are blatting the whole ISM band, you'll just lose a packet here and there which the system copes with fine.

Plenty of traffic light systems in the UK are wireless - saves digging up bits of road, you just need power. I don't know about Germany.

Re: Bluetooth 5 Now Available

#147

Post by kraftman »

BinaryIdiot wrote: post #75

Considering every phone I've tested (iPhone 5S, iPhone 6+, Samsung Note, Moto X, Nexus 6P) with 7 different bluetooth headphones (ranging from cheap Amazon ones to expensive LG) I have NEVER found a phone, paired with headphones, that stayed connected especially when the phone is in my side pocket and I'm walking in an open space which seems to make connectivity significantly worse. For instance getting on the BART b…

On the flip side I've been using my bluetooth headphones every day for over 3 years and I've never had them cut out once, other than if I leave them on from my desk to the kitchen which is about 20 ft and through a few walls.

Re: Bluetooth 5 Now Available

#148

Post by kraftman »

Analemma_ wrote: post #46

Seeing a new Bluetooth version is like being a fan of a perennially losing sports team. You hope that "Maybe this is year they finally get it together!", but deep down you know they won't. The three certain things in life are death, taxes, and Bluetooth being flaky.

What do they not have together?

Re: Bluetooth 5 Now Available

#149

Post by fest »

problems wrote: post #56
seanp2k2 wrote: post #49

Earlier quoted context omitted.

Yep, I wanted to love Bluetooth for keyboards, but my Logitech and Microsoft wireless keyboards (work and home, respectively) work great with their proprietary receivers (basically like a wireless wire), while the Logitech K810 has random key lag and connectivity issues (try typing your password when Bluetooth doesn't work and you can't log in to re-pair it). Windows 10 also seems monumentally bad at Bluetooth, and I…

> basically like a wireless wire Yeah, watch out with those, because a wireless wire is about accurate security wise too. Typically the proprietary dongles have very little security wise.

It can be even worse than I suspected. Turns out, even your mouse dongle can be used to inject keystrokes: https://media.defcon.org/DEF%20CON%2024/DEF%20CON%2024%20pre...

Re: Bluetooth 5 Now Available

#150

Post by danieltillett »

Thimothy wrote: post #145
pselbert wrote: post #112

Earlier quoted context omitted.

This was a magnificent explanation, and precisely the kind of comment I hope for when reading HN. Thank you for taking the time to share.

If I were you, I'd try to forget it as soon as I can, becouse it's wrong. 2.4 GHz is not in the water absortion band (I'd show you a nice graph, but I can't find one that goes to such low frequencies), a microwave would work as nicely in 1 GHz or 5 GHz, what matters is the H-O bonds, that are esentially electric dipoles and are excited when high-ish frequency and power hits them. You probably have noticed that fat he…

I don't think your comment is very constructive, but more importantly what the OP actually said is not wrong.
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