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.
What is Audiogram. Audiogram is a graphic record of hearing ability for various sound frequencies that is used to measure hearing loss. The frequency range for most audiogram normally go from 100Hz to 8000Hz, which is most essential for speech comprehension. The hearing ability is expressed in dB HL (decibel hearing level), which measures hearing loss. 0dB HL represents the average hearing threshold for people with normal hearing.