Editing Resonator (section)

== Mechanical ==
{{main|mechanical resonance}}
{{see also|Mechanical filter#Resonators}}

Mechanical resonators are used in [[electronic circuit]]s to generate signals of a precise [[frequency]]. For example, [[crystal oscillator|piezoelectric resonators]], commonly made from [[quartz crystal|quartz]], are used as frequency references. Common designs consist of electrodes attached to a piece of quartz, in the shape of a rectangular plate for high frequency applications, or in the shape of a [[tuning fork]] for low frequency applications. The high dimensional stability and low temperature coefficient of quartz helps keeps resonant frequency constant. In addition, the quartz's [[Piezoelectricity|piezoelectric]] property converts the mechanical vibrations into an oscillating [[voltage]], which is picked up by the attached electrodes. These [[crystal oscillator]]s are used in [[quartz clock]]s and watches, to create the [[clock signal]] that runs computers, and to stabilize the output signal from [[radio transmitter]]s.

Mechanical resonators can also be used to induce a standing wave in other media. For example, a multiple degree of freedom system can be created by imposing a base excitation on a cantilever beam. In this case the  [[standing wave]] is imposed on the beam.<ref>{{ citation | title= The development of a virtual probe tip with application to high aspect ratio microscale features|author1=M.B. Bauza |author2=R.J Hocken |author3=S.T Smith |author4=S.C Woody |journal=Review of Scientific Instruments | publisher=Rev. Sci Instrum, 76 (9) 095112  | year=2005 |volume=76 |issue=9 |pages=095112–095112–8 |doi=10.1063/1.2052027 |bibcode=2005RScI...76i5112B }} .</ref>  This type of system can be used as a [[sensor]] to track changes in [[natural frequency|frequency]] or [[phase shift|phase]] of the [[resonance]] of the fiber.  One application is as a measurement device for [[dimensional metrology]].<ref>{{cite web|url=http://www.insitutec.com|title=Precision Engineering and Manufacturing Solutions - IST Precision|website=www.insitutec.com|access-date=7 May 2018|url-status=live|archive-url=https://web.archive.org/web/20160731063517/http://www.insitutec.com/|archive-date=31 July 2016}}</ref>