It may be you have a directional mic instead of an omnidirectional mic. A directional mic will only pick up the sound it is pointing at. BTW, microphones do not have a volume control to turn up, they have a gain control.
The volume comes from the microphone not the webcam. Unless the webcam has a built in microphone. But even then it's still registered as a microphone and all the volume settings and controls will be in your sound and volume options with the other recording and playback audio controls
Option A you don't have a microphone on your computer, Option B your microphone isn't on...
The trick to getting good sound in video is the microphone placement. If you have a microphone jack on your camcorder, you might consider an upgrade to a boom microphone or even a wireless system. If you don't have a microphone jack on your camcorder (most consumer models don't), you can use a solid state digital audio recorder to get the best microphone placement, and sync the sound in later when you edit the video on your computer.
The main difference between a cardioid and hypercardioid microphone polar pattern is the directionality of sound they pick up. A cardioid microphone is more sensitive to sound from the front and less sensitive to sound from the sides and rear, while a hypercardioid microphone is even more focused on sound from the front and has a narrower pickup angle, making it better at rejecting off-axis noise.
The frequency response of the microphone may emphasize particular sections of your voice that are not heard when you talk unamplified.
The main difference between a cardioid and a supercardioid microphone polar pattern is the directionality of sound they pick up. A cardioid microphone is more sensitive to sound from the front and less sensitive to sound from the sides and rear, while a supercardioid microphone is even more focused on sound from the front and has a narrower pickup angle, making it better at rejecting unwanted noise from the sides and rear.
Though they have same volume,they have different masses.
Yes they have a good sound even though they are cheap !
Your speaker could have blown.
Yes. The last sound is a long e sound, even though there is actually no e.
diffract
An example of diffraction of sound in daily life is when you can still hear music coming from a room even when the door is closed. The sound waves diffract around the edges of the door, allowing the sound to reach your ears.