I was sitting on my chair in office when my cell phone rung. Somebody was calling me, so there was a caller tune which was played.   But then I realized my speakers were producing strange sound when my phone was ringing.  My friend said It was because of disturbance produced by radiowaves. But even he was not sure why it happened.   Do anybody know the possible cause that made speakers make strange noise.  It only happens when there is a call or message on my cell phone, not when I play any song etc on phone
121661
Once I had kept my cellphone near a computer speaker. After some time, a call came over my phone. Strangely, the speaker started  humming and beeping till I received it. Why did the speaker started humming when the call came?
3411
I have many different AC adapters and power supplies for a variety of devices, ranging from small 5V/1A USB chargers to laptop power adapters and desktop PSUs. However, I often hear a whining noise from  some of these power supplies. This happens most often when they are not connected to a device or otherwise in use, and stop making noise when I connect a load to it such as by plugging in a device that is not fully charged.  Why do some AC adapters and power supplies make this whining noise? Why do some not make this noise? Is there anything I can do to suppress it?
109729
Is there a way to capture the currently playing "sounds" ?  For instance, If I want to copy (to an audio-file) the noise I make while playing a flash game, is there a way to record what is currently to be heard in my headset ?
78591
My Windows 7 system makes an intermittent ding sound (like a single chime, or bell).  I don't know which process does it.  So, my question is: Is there software/method out there that can tell me which processes are currently sending output to the sound device?
105851
At times, my computer suddenly played some annoying short sound (sounds like darrrt, seems not from the system), and it's so short that I have no idea where it comes from (and cannot capture it).  Is there any ways to find which program/process did that? (I really want to kill it!)  I am using OS X Mavericks.
71999
I've noticed this issue on my Sprint Samsung Intercept running 2.2 Froyo (rooted, custom kernel, etc.) I swear I didn't have this issue on Android 2.1, but someone with a Motorola Droid running 2.1 did, as you can see here:   My issue is I love the WinAmp music player. However, when I pause it and leave the app, it will randomly, unexpectedly begin music playback later (both when I am using the phone, and when it's sitting on the ground next to me.) When I navigate to the app, the controls show that it is paused, and clicking on it once will bring it to the normal state (shows as playing, and it is,) and a second time will pause it again (where it should have been to begin with.) This could be a real issue while I'm in class, etc. and I'm forced not to be able to use WinAmp, which I'd really like to be able to do.  With Cubed, the issue is similar. Instead of having it be random though, it plays when I go back to the app. This leads me to believe that it's playing onResume(), without first checking the state it should be in. I'm guessing WinAmp is staying open in the background somehow and doing the same thing.  My question is, is there any fix?
24455
I have a pair of Sol headphones that would always fit into my iphone until recently I realized that my iPhone didn't have any sound coming out of the internal speakers.  It was my headphone jack that is causing the issues and i just cleaned it out but now its not working and the sol headphones I mention just don't fit into my iPhone. I barely get the tip in and nothing else can go through and im not trying to force it in.   How do i fix this?
63515
When I'm at work, I usually have a headset on my head and I am listening to music. My phone is always on vibrate to respect co-workers.  However, I don't keep the phone in my pocket because of its size, so I don't feel it vibrating.  I miss a lot of calls.  I was wondering if it's possible to forward "phone is ringing" notifications to the PC, ideally via a Bluetooth connection.  I would not mind installing a 3rd-party app on the phone or software on the PC.
5701
I have an iPhone 4S and the speakers are not working for applications. The speaker works when doing voice calls on speaker phone, adjusting the ringer, and other default things.  However, when trying to have audio for YouTube and other applications it does not work.  It wasn't working for IOS 6.1.3 and I have now upgraded it to 7.0.4 with no luck. I then restored again with no luck.  I believe the fact that it works for the speaker phone and ringtone would suggest it is not a hardware problem but a software problem.  Any suggestions?
108764
Every once in a while, my eighth-inch audio jack will slip loose and I'll seemingly lose only the voice part of a track -- leaving somewhat of a "karaoke" version. What I would guess about how audio plugs work suggests that I'd be making this up; however, I've asked and others tell me they've experienced this as well.  What causes this stripped vocals from audio when a 1/8" audio jack is partially unplugged?
87804
This is definitely not an illusion, as many people have the same experience. I have usually lived in places miles away from train stations, which makes it unlikely to hear any train horns during the day. However at night, occasionally train horns can be heard. I hope if any one can explain the physics of this effect, like possibly sound travels faster at low temperature.
53016
Recently I'm working on a project aiming to convert the vibration of sound waves into electricity to charge batteries using a piezoelectric material (MFC type). I was trying to use the human voice as an input, but theoretically it was not enough, so do you have any ideas about some places that I can apply my project on it (that must be noisy or can give me vibrations)?  Moreover, has the MFC material been used before in this application? If I used many pieces of it in parallel would that help?
41862
I have observed sometimes that when I keep some objects precariously balanced, for e.g. some objects in a cupboard, they seem quite stable at the time when I place them there but after a certain period, maybe even 8 - 12 hours suddenly you hear a noise and you can see that they have fallen for what seems like no apparent reason. What can be the reason for this? obviously, I am looking for a physics explanation and not a supernatural one.
77462
This is the most interesting thing I have seen! I have built a  that sends data (D0-D7) to a DAC (ADV2175). The design worked fine and I just have a low frequency alias noise (). This noise was present on all my ground planes (This is in prototyping stage and that's not unexpected from the test PCB).  I started tracing the noise path by disconnecting wires to see when the noise is gone. Surprisingly even after disconnecting all VCC and GND connections (+ all VREF and logics gone to 0 or 1) the noise was present yet. The more unexpected behavior is when the DAC is just connected to DATA port+ CLK pin (all coming from the source FPGA, NO VCC or GND), it continues working and a sine wave is produced (but with the same noise)!!!  First I thought it may receive its VCC/GND form the logic 1/0 fed into it but if it was correct, it should not have produce 0x00 and 0xFF levels, but it makes those levels correctly (I changed 0xFF data stage to another level and a notch appeared on top of the waves. this shows it can build oxFF correctly).    This is a big challenge for my PCB design, as if this device really takes its GND from the data port, instead of the dedicated pins, I will have a hard time for designing a reliable ground plane for it (the return voltage should go back to a logic noisy environment and analog-digital ground plane isolation may be impossible).  Can anyone explain what is happening there?
76925
I have a USB cable that can connect my Android smartphone to my laptop's USB port.  This scheme is obviously cheaper than buying a separate standalone computer microphone. My computer's microphone is shoddy, and many people can't hear it well.  Does the answer differ if I receive sound thru:   my computer speakers or external speakers connected to my computer?  vs. my phone?
102826
Sound Problem - No Audio Input is Shown i.e Microphone is not Visible ,neither the "Headphone" profile is available !  I have Headphone connected and I can hear voices coming out of it !  I suspect Cadence or GLadish is responsible for this  ! Please help. I also suspect resetting all audio related settings to back to its factory state will solve this issue !! But I dont know how to do that !?
71650
When I place a call I hear the traditional rotary dial phone ringing sound until the person at the other end, whose ringtone most likely is completely different, answers. What I was wondering is, can I set a ringtone for the person placing the call to hear until the other party answers? If so, can such "ringtone" be set differently for every person called?