ฝัง
- เผยแพร่เมื่อ 21 พ.ย. 2024
- Turn your phone into a sonar with phyphox! In this video I will explain how this works.
Get phyphox for free on Android and iOS: phyphox.org
Support us: phyphox.org/do...
You can also watch a German version of this video:
• Smartphone-Experiment:...
Twitter: / rwth_phyphox
Facebook: / phyphox
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You. Are. AWESOME!! Thank you so much for your gifts to the community in the form of these educational and instructional videos and FREE applications! You are very appreciated and I cannot thank you enough for making these experiments so accessible for future scientists and those of us who are just curious about these concepts!!!
Thank you for this app I get to study science in a new way. This is better than getting a chemistry set when I was a lad. Although I never got a chemistry set my family was too poor. But these science experiments in an app makes up for what I didn't have as a lad thank you.Shalom Samiel
My husband and i just did this with my five year old girl and it was very very cool to interpret the data!
Thank you so much, recently downloaded your app and it seems that improved a lot!. Thank yoy again!
Today most phones are waterproof. It woulf be awesome if you tries this under water!
I have to do this for a physics assignment and I need to find the distance on the app. How do I do that? Do I go off the highest point?
Hey there
My name is Manon Goudeseune. I am a 18 year old girl from Belgium. For a assignment for physics we have to use Phyphox. I chose to try out the sonar experiment. I ran the experiment and collected the data, but I don’t know how to interpret the graphs. I have to know what the relationship between the distance from the source (mobile phone) and obstacle (metal plate) and the time between transmitting and receiving the signal back. I also need to be able to determine the speed of sound.
Can you help me? Which tabs do I need to use? How do I read te graphs correctly?
I hope for a fast reply.
Thanks in advance!
Yours sincerely
Manon Goudeseune
Hey Manon, we have answered your corresponding e-mail on Tuesday. Have you received it?
Instruction unclear prevented the sinking of the lusitania
Thinking about it. What if the frequency was high enough to were the human ear cant hear it? Hook that up to a head set and you technicly have night vision more advanced then what the milatary has since you dont need IR. But the you would need good speackers, microphone, decent battery. Oh and dont reccomend using it near dog or cats. Itll freack em out. Better yet you would functionally have thermals with no thermal benifits.
It would still be sonar. And unless you have a complex algorithm running on a very good computer you won't "see" anything at all y
Mine always reflect something at 34cm and theres NOTHING there and im further than that from ground celing or wall
(Didnt use the protection around the phone)
This is the very first data point in the graph, isn't it? The veeerry dominant signal directly from your speakers at roughly 0s needs to be cut off. So you are seeing its foothills.
The first 2ms after the chirp are discarded in the audio recording, that is why any object within 1ms × 340m/s = 34cm is “invisible” and the graph starts right there.
@@phyphox and what the normalized to spherical surface means ?
@@b.h1362 Sound propagates spherically, so its amplitude gets “distributed” on a spherical surface and lower. Accordingly, in the bottom graph the signal is amplified by distance squared (proportional to the surface area).
Sooo, this is how the new sleep tracking technology on apps (like Sleep as Android & Sleep cycle) works?
Yes, Sleep Score app also has sonar technology.
How does Timing in Sonar works? (still in phyphox)
Bravo. Thery good progect which halp people colaborate and make expiriments in all world like in one laboratory.
I interesting radar ultrasound. And people too can hear and use it. Like in phone we hear if felas talk in basrum or in plase without wall. We hear echo. And i very interesting can we make radar program wich make sound analisis in call time ?? Can we image what is the plase in the end of phone line? Can its be some grafiks visual mode like a poor picture of this plase?
Did you know some people or progekt who work with it??
Thanks alot!!
I doubt that this would be possible. You can see from the video what we can do with phyphox, which requires some shielding from the environment to get an idea of the reflections from a single directions and from well defined reflectors. Getting reflections from all directions from a single speaker to a single microphone is an entirely different story and seems to me unsolvable. The problem is symmetrical about the axis from the speaker to the mic, so for each reflection at least the angle around this axis will be unknown and the other angle seems to be similarly problematic. And I am not even talking about multiple reflections and diffuse surfaces... So, no, I don't think that this can be done.
Sebastian Staacks thanks
I hate this fart noise used for sonar.
Once you've heard it you can't unhear it... ;)
Yeah I mean it could be improved.
Well, it is not designed to be a nice sound.
What you hear is the quickly rising frequency (this chirp as explained in the video) which sounds like a click. But we repeat the sound five times simply to have more data to analyze. The timing of these five clicks is what reminds you of a fart, but this timing has some restrictions as well. A new click starts about every 30ms, which is approximately the delay of an echo from five meters away. If we reduce this delay (which probably would be even more farty), we could not measure up to five meters any more (which does not work too well anyway) and if we increase this delay (which would probably make it less farty), the calculations will take longer (which already is a problem on many phones).
(Can't believe that I actually discussed the fartyness of our sonar sound in so many words...)
@@phyphox lol great app btw
I tried connecting my phone to my iPad with the remote access thing but when I look there’s nothing on the graph.
Thank you for the report. I cannot reproduce it with current iOS and iPadOS for the sonar experiment. Could you please send us a screen shot and details on the firm- and software versions?
The animation is dope
Impresionante gracias
Yes Avery great sonorsystem
Anything that has a speaker can be turned into a sonar 😂...the problem is the reception part.
Awesome
what kind packaging material did you use in the video?
If I remember correctly, it was the packaging of a Spectra Millenia High Power CW laser.
There are probably cheaper alternatives to get foam-padded packaging and pillows work well, too ;)
Thank you!
@@Octo_Chara See twitter.com/costelloschool/status/1352265394841673728, for instance. A stack of toilet rolls or any other sufficiently long paper tube also work quite well…
Ok
感谢就我大物实验一命的xgg！
can we change frenquency to use it for an object underwater ? I need an answer asap for college essay
Not sure if this helps under water, but you can change the frequency ramp with our editor at phyphox.org/editor. Click "load experiment" and select sonar. This experiment is rather complicated, but you should be able to easily find the "ramp" block within the "analysis" tab. You are looking for the one that has "start" set to 1000 and "stop" to 4000. These are the start and stop frequencies of the chirp and you can just edit them to your needs. Keep in mind that the phone samples sounds at 48.000 Hz, so anything much higher than 10.000 Hz will have a small resolution (and the regular speakers will not produce them well if you are using the built-in speaker) and anything above 24.000 Hz cannot be sampled at all.
When you are done, simply go to the download tab, click generate online QR code and then scan the resulting code via the "+" menu in phyphox.
@@phyphox Thank you so much sir ,i'll try it out ! (late notifications haha)
Idk how can I understand the graph
The app looks for echoes in the overall noise received by the microphone. The height of the spikes indicates how well it matches with the signal. The time difference between signal and perceived echo is then utilized to compute distances or the speed of sound.
@@phyphox hello, may i know how to determine the time difference from the graph?
@@syazanaazhar3030 By “reverse” computing: you read distance or speed of sound off the graph, get the other value by the input field, and divide velocity by distance. The time difference is twice this value, i.e. t = 2 × distance / c, as the sound travels forth and back.
@@phyphox thanks for the explanation
cool!
Mine didnt make any sound, is that normal?
Depends... It respects the system volume setting (should be the same one as for music playback). Did you turn it up?
It crashes whenever I try to use the sonar and idk y
That is not supposed to happen (obviously).
Can you tell us, which phone you are using and if you have any audio peripherals attached (Bluetooth headphones often are connect unintentionally). If you are using an iPhone, we have just fixed a few things that might be related to that crash, but the fixes have not yet made it into the release version of phyphox. If you are indeed on an iPhone, you can try our beta version via Apple's test flight at testflight.apple.com/join/r05iODWL (you need to install Tesflight and open this link from your phone/iPad).
Please keep in touch as we really want to resolve issues like this.
I’m using an iPhone XR. I didn’t have any headphones connected during the first testing. Thank you so much for providing the link to the beta version. The problem has been fixed.
@@Octo_Chara Great to hear and thanks for testing.
You’re welcome, I’m happy to help!
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❤
Turn my phone into a sauna ? :)
Hallo
不错