Sound Waves

underwater listening devices the navy uses sona bouys which is an active systems that is place in a pattern where suspected submarines are, they are launched out of a p3-orion or an S3-viking, also they have a system of underwater microphones called the sousis (maybe not the correct spelling) but it monitored 24/7.

Also, most ships and submarines in the Navy have passive SONAR (listen only mode) as well as active (send a sound, then listen for the return) to detect what is near them in the water. The advantage to using passive, is that if you can keep your own ship quiet enough, the other vessel may not know that they have been detected.

The eventual diminution of a sound waves is usually as heat dissipation in the wall materials, or perhaps in specially designed sound absorbers. During this process, the original amplitude of the wave will gradually diminish.

Do you mean a "saw-tooth" wave? Also, a "peak value" is not an RMS value (by definition), it is simply the highest value attained (positive or negative) over the period of analysis.

The logarithmic unit of measurement "decibel"" is abbreviated as "dB"

The intensity of a sound produced by a point source decreases as the square of the distance from the source. Consider a riveter as a point source of sound and assume that the intensities listed in Table 12.1 are measured at a distance 1 m away from the source. What is the maximum distance at which the riveter is still audible? (Neglect losses due to energy absorption in the air.)

Anything that you can hear.

vibrate at its natural frequency APEXX

Standing sound waves.

The air carries the sound. If you shouted on the moon, nobody would hear you as there is no atmosphere

ppp-->pp-->p-->mp-->mf-->f-->ff-->fff

Sound waves travel fastest through solids, then liquids and gases. This is because sound waves requires medium in order to travel. Solid's particles are very tightly packed with each other thus sound gets more medium to travel faster. Liquid particles are less close to each other and gas is the least. Temperature also increases the speed of sound. higher the temperature, higher the speed of sound.

Yes, they can.

Normal sound waves (the curvy kind) are called sinusoidal, because when graphed, they use equations with the trigonometry function sine.

However, sound waves can also be triangular (pointed instead of normal curves), square (flattening at the top or bottom of the curve), or "sawblade" which is shaped like a saw blade.

You can listen to examples of each of these on the wikipedia page for "non-sinusoidal sound waves" which I don't have the link for not but its pretty easy to find.

Because sound waves are mechanical vibrations of material matter. You can't

have sound waves in a space where there's no material to vibrate.

It all goes back to the basic properties of the states of matter. Solids have a definite volume and shape. Liquids have a definite volume but take on the shape of their container. Gases (including "air") have an indefinite volume (meaning that you can compress it) and also take on the shape of their container. Since air is compressible, it can give, much like a spring, thus introducing delay when there is considerable distance.

Speed of sound in air is dependent on the air pressure, and air pressure is dependent on height above sea level. Up high, pressure is lower and speed of sound is different.

rarefraction

Sound can only move through matter. For example, when you speak, the vibration of your vocal chords create vibrations in the air, and each vibrating air molecule causes adjacent air molecules to vibrate, and those air molecules make other air molecules vibrate, and so on as the air "propagates" the sound waves. Space is a vacuum, so sound cannot travel through space.

The answer to your question is the word "speed".

For a young and healthy human; 20000 times per second.

343246

When you say "fix" does that mean it used to work at some point and then it stopped working all of a sudden? This can be due to a recent upgrade. Maybe you upgraded to Windows 10, which in such case it's common to run into such internal mic issues.

There are three things you can try:

1. Update all driver: The issue may be due to some conflict with the drivers. You can update manually or download and install a software called "driver easy." The driver easy automatically recognizes your windows version and will install the best drivers for it. It's easy to use as well.

2. Also, you can try setting your mic as the default. In some cases, this helps. All you need to do is right-click on the speaker icon at the bottom right, select "recording devices," then in the sound dialog, click the recording tab and select your mic as default.

When we hear sound we do not feel the pushing the air becasue the sound waves are in form of comprestional waves.

They use ultrasonic. The sound they use to locate objects that may be invisible.