Aside from quartz, the opposite substances that exhibit the piezoelectric result are Rochelle salt and tourmaline. Rochelle salt exhibits the greatest piezoelectric impact, but its applications are restricted to manufacture of microphones, headsets and loudspeakers. It is because the Rochelle salt is mechanically the weakest and strongly afflicted by moisture https://crystal-oscillator47158.theblogfairy.com/34081667/crystal-oscillator-for-dummies