the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

the acoustic phenomenon that gives sound a penetrating quality

any sharply pointed projection