NEMA SB 10:1991 (R2010)
NEMA SB 10:1991 (R2010) Audio Standard For Nurse Call Systems Describes requirements and test procedures for evaluation of audio quality of installed nurse-call systems.
Table of Contents
ForewordScope
Purpose
Introduction
History
1Definitions
Intercom
Microphone
ModeA
ModeB
Nursecontrolstation(NCS)
Patientstation
Pillowspeaker
Pinknoise
Signaltonoiseratio(S/N)
Soundpressurelevel(SPL)
Speaker
2Generalrequirements
Equipmentset-up
Systemoutputlevels
Systeminputlevels
AmbientSPL
Minimumsignaltonoiseratio
Figure2-1,SetupformodeAlevel(NCS)
Figure2-2,SetupformodeBlevel
Figure2-3,SetupformodeBS/Nratio
Figure2-4,SetupformodeAS/Nratio(NCS)
3Testequipmentrequired
Testequipmentrequired
Figure3-1,Testsetup
Figure3-2,Testsetup
4Testprocedure
Datarecording
NCSoutput/patientstationinputsensitivity
ModeAsignaltonoise(patientstation)
ModeAlevel(pillowspeaker)
NCSS/Nfrompillowstation
ModeBlevel(patientstation)
ModeBS/N(patientstation)
ModeBlevel(pillowspeaker)
ModeBS/N(pillowspeaker)
Table4-117,Nursecallaudioperformancedata
worksheet