why sound is created during mosquito flies?
338437
Mosquitoes flap their wings at a high frequency which causes waves in the air. These waves are nothing but sound waves of frequency within audible range. thus you can hear the sound.
818797
Most bats (or at least many, many bats) generate a very high pitched sound called an 'ultra-high frequency sound'. Say that someone sings a note. Then the note keeps getting higher and higher and higher. After a time, the note would be so high that people couldn't hear it, BUT IT WOULD STILL BE A SOUND. It is just a high sound that you can't hear. \n\nOk, so bats have this little thing in their heads, usually behind their noses, that makes these sounds. Most of the time, the bat's noses are shaped like little speakers, or little trumpets, so that they can send this sound out better. Then, in order to hear the sound that comes back, or echos back, they have big ears. If you'll notice, the little yellow baby bats here have really big noses, and really big ears. This echo that they hear when the sound comes back gives their technique it's name of 'echo-location'. When the sound that they send out hits the trees, ground, bushes, animals, insects, and other things around them, it bounces around in all different directions. But, the bats are able to tell the direction or angle that the echo is coming back from. This lets the bat know the direction that things are. Now, since sound travels very fast, the bat is also able to tell how long the sounds take to come back to them. So, now the bat knows where the echos are coming from AND how far away things are. Since sound travels very fast, this all happens almost instantly, and since the bats also are very, very fast they are able to know exactly where they are while they are flying without using their eyes.
482111
Your question lacks specification so that the answers may clearly give you results according to your expectations. any object can make sound for sound is a wave of energy which is released due to a collision of some sort. sound can be created by speakers which uses a permanent magnet with a coil of wire inside of it which has a electrical current flowing through it which in turn vibrates the speaker to make a electromagnetic wave which we interpret as sound.
78979
None, sound is a wave not a particle. Sound is just a wave of vibrations travelling through atoms.
1072685
Noise is created with the movement of particles.  The popping noise is caused by the air particles inside the balloon very rapidly moving outside the balloon.
1168312
there could ether reason that the noise created by the pindrop is so soft that are brain does not catches it.\n                                 OR\nin science language the sound which is produced by pindrop is lesser than 20HZ.as human can hear sound produced between 20HZ to 20KHZ(kilo herdz) frequency.
32628
When you clap your hands, you compress the air between your palms.  That compression of air causes the load clap sound.  When a jet travels at extremely fast speeds, it compresses air in front of it and so causes the sonic boom.  The same goes with thunder.  When lightning strikes, the air around the lightning bolt is heated to very high temperatures and expands and pushes out at the surrounding air and this causes a compression against the surrounding air and you hear the violent thunder.
306289
It still sends sound waves through the air, yes.  It does not, however, make noise.  Because noise is defined as something we hear, and obviously no one can hear it.  I know, I have a lot of time on my hands to come up with answers.
85114
Insects' sound receptors are usually thin membranes or hairs formed by their exoskeleton in intimate association with neurons. \nThe membranes are called "tympanic organs" because they act much like our own tympanus. They're usually paired and may be located on the abdomen, thorax, or legs. \nThe hairs are called "hair sensilla"; they also vibrate in response to sound waves. These are usually located in the cercae (special rear appendices), legs, etc.
1014693
When a mosquito bites it injects it's proboscis and withdraws blood\n\nWhen a Black fly bites it tears off a  chunk of flesh
74224
the noise comes from the passage of air. The air has to escape either from your nose or from your mouth. If you close one and not the other.......the noise will continue, however, in a somewhat muffled different tone. Close both and the noise ceases. Again, this is because the noise occurs due to the vibrations caused by the passage of air. With the passages closed.......the air does not pass.
193662
To reduce the risk of diseases carried by mosquitos including Malaria and West Nile virus among others.\n\nAlso to avoid the hassle and irritation of the bites.
84345
Think of an airplane as a boat for a moment. You know that a fast-moving boat causes a wake to form behind it. Well, an airplane does this with sound waves. Sound waves propogate ahead of an airplane if it is going slower than the speed of sound. However, if an airplane breaks the sound barrier, the sound waves are pushed together. At first, you hear nothing, and then you hear the sonic boom (the "wake" of the airplane).
36325
The question really boils down to weather we define "sounds" by that which is heard, or the physical vibration of air molecules (we can also define vibrations in other fluids, like water, as sounds). \n\nObviously, when a tree falls in a forest it creates a massive vibration of air molecules, but if we define a sound as only the impulses transmitted from our inner ear to our brain and the recognition of these transmissions, then we can say that the vibrations from the tree fall became inaudible before reaching anyone's ears and therefore produced no sound.\n\nWe must also consider the other species, especially animals who have ears and brains and respond to aural impulses. Surely any forest will have such creatures within earshot of the falling tree. It would be arrogantly anthropocentric to define sounds as only that which is heard by humans.
641409
The noise aliens make.
843905
20 micropascals or 0 Decibels. According to wikipedia, this is about the loudness of a mosquito flying 3m away. That's pretty quiet.\n\nThere is however a frequency dependence, and old people obviously don't hear as well, but 20 micropascals is the standard value.
616034
No. The enormous amount of heat produced by lightning expands air suddenly, causing the sound we refer to as thunder. The reason we don't always hear thunder (right away) is because light travels faster than sound. We don't always hear that sound because it might be very far away, but we still see the light.