Researchers went through 17 studies that examined the penis size of more than 15,000 men. They found that the average flaccid penis lengthâfrom the base to the opening on the tipâwas 3.6 inches and the circumference, measured around the base or mid-shaft, was 3.7 inches.
Reverberation artifact is a common ultrasound artifact and occurs when a sound pulse reverberates back and forth between two strong parallel reflectors.With the exception of comet-tail artifact, a subtype of reverberation, reverberation artefact has little diagnostic use.: Reverberation artifact occurs when an ultrasound pulse gets trapped between two strong parallel reflectors.
There are two subtypes of reverberation artifact: 1  comet-tail artifact: a short train of reverberations from an echogenic focus which has strong parallel reflectors within it (e.g. cholesterol crystals in adenomyomatosis).hen the ultrasound beam reflects back and forth between the reflectors (revereberates), the ultrasound transducer interprets the sound waves returning from the reverbration as deeper structures since it took longer for the wave to return to the transducer.