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.
A sound extender, sometimes called a chime extender or sound amplifier, is a device that allows you to hear your doorbell in areas where the doorbell is difficult to hear. This typically occurs in areas located at a far distance from the main door or where loud activities prevent the bell from being heard. Many wired doorbell systems offer sound extenders as accessories. Or, in many cases, you may add a wireless sound extender to an existing wired doorbell system.