Quiet Door Hardware Examined

Author: Brian Rhodes, Published on May 06, 2012

The incessant buzzing of electrified door hardware can drive people crazy. Is noisy door hardware the norm? In this note, we examine the causes of 'noisy' door hardware, examine the business case for buying 'quiet' hardware, and compare the cost of 'quiet' technologies to common alternatives.

Overview

***** ******** ************* ***** ***** **** ******* *** '** ***** as * ***********'. ***** ** * ****** ************* ******** ****:


Why ***** ******

******** ***** ****** **** ***********, *** ***** ** ***** *******, **** *********. **** * credential ** ****, *** ****** ************* ********* ******** ** *** door *** ***** ****. **** ** **** ******, *** *******. When '******', *** ****** ******** *** ******** (*****), *** ****** the *****. **** ********* ** ****** *****, *** ******** ** powered **, *** *** ***** ** *********, ******** *** **** to ***** ****.

**** *** ****** ******* ** *****, ** *********** '*******' *** polarity ** *** ******** **** ** ** ****** *** ******. ***** *** ********* ** ** *****, *** *** ****** still ***** *** ******** ** ** ********* ********, *** ********* a ********** '**********' *****. **** ***** ** ***** ******** ** as '*******'; ** ** '*** ***'* *** **** **** ****** in?'

The ******** ** *****

**** ******* ** ************* ********* **** ***** ** **** ******* solenoids (****** *** **** ****** **). ******* ** ******** ********* rapidly ** ***** *** ******,* ****** ****** ******* ** ******* *** ********* ***** *** ******** ******. *** **** ***** that ******** ** ******** ** ********** ******* ** *** ******** to **** **** *** ******.

*********, ** ******* ********* *** ******* ~** - **** ** sound, ***** ** ******* ******** ****** ******* ~****. (******* ********** charts ******* ***** ******* ********* ******** ** **.) *******, ********* ** ******, **** ***** ********* *** ********* performance **** ***** ** ********, **** ******** (**********), ** ***** and ******** ** ******.

*************, ******** **** ******** **** ******* ***** *** ***** ********** ********** ******* **** ***** ** ******* *** ** *** ******** entirely. ******* ** *** ******** ***** ************ *********, ** **** a ***** ** ** ***** *** **** *** ***** ****. A ****** ******** ** **** ** ***** *** ***** ** and *** ** ********, *** *** ***** **** ** ********* in ****** **** ****** *** ********. '***** *****' ********* ******** versions ******* **** **** ** ***, ******* **** **** **** DC ******* ********* (****** **** ** ***** *** ****** -**** **** * ***** ******* ** *****).

Where ***** ******

*********** ***** ******** *** ** ********* ** ******* ***** ** buildings. *********, ******, *** ********* *** ****** ***** **********, *** eliminating *** ******** **** ** ***** ***** ****** ********* ******** environments. ***** ************ *** ******* ******* ***** **** ** **** entries, ***** *** ****-***** ******* ** ***** *** ******* ******* or ********.

**********

*** ** ********** ****, ******** ****** ******** *** ** ******** to ******* *******. ** ****** *****, ******* ***** '***** ********** voltage' *** **** ******* **** ****** ** ** ** *****. As * ******, *** '*****' ** ******** ** ********* ********** in ***** ****** ******. ******** * ** ***** ****** ** operate ***** ******* ********* *****.

** *** **** ********* **** *****, ********* ***** **** ********* 'ultra *****'*** ***** ****** ********* *** ~$***. *******, **** ****** ** ~$*** **** than'***********' ******************.

*************, ******* ******* ***** ********* ******* ****-**** ***, ******* *** the *****-**** ** ****** ** *** *** *********, *** ** are ****** ** ******* ** ** **** ******. **** ******* hits *** ******, ** **** ****** **** **** ***********.

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