A lucency just means a dark area on the x-ray/CT as opposed to an opacity (which is a white area). I'm not sure what type of CT scan you got (i.e. with or without contrast injection), but don't jump to conclusions about it being cancer..... lucency just means a dark area on the x-ray/CT as opposed to an opacity (which is a white area). I'm not sure what type of CT scan you got (i.e. with or without contrast injection), but don't jump to conclusions about it being cancer.....
The operational details of amplifiers are buried in the field of electronics, but for audio purposes it is usually safe to say that current commercial audio amplifiers are so good that a normally operating amplifier is seldom the limitation on the fidelity of a sound reproduction system.
The Demonstration: Someone speaks into a microphone that is connected to an oscilloscope and you can see the patterns creates by their voice. Quick Physics: Sound is a wave that caused by vibrations in the air. A pure musical sound, such as a whistle, will produce a sine wave like the one shown above.Someone just talking with produce an irregular wave because it is a combination of sounds and the sounds waves add together to get the composite shown on the oscilloscope.The Details: You can see sound waves when a microphone is connected to an oscilloscope.A microphone changes the sound waves into an electrical signal. The oscilloscope then shows what these electrical waves look like.For a pure sound of only one frequency, like a tuning fork or whistling, the wave looks smooth and regular (as in the picture below). pure musical sound, such as a whistle, will produce a sine wave like the one shown above. Someone just talking with produce an irregular wave because it is a combination of sounds and the sounds waves add together to get the composite shown on the oscilloscope.