3M C860, Руководство пользователя

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SOUND/LISTENING SURVEY
Objective measurements do not necessarily reflect perceived intercom sound quality; therefore, 3M conducted an
initial survey of QSR employees familiar with using intercom equipment, rating their sound preference of the 3M™
Wireless Intercom System, C1060 as compared against the competitive digital intercom system. The audio
recordings prepared by Orfield Laboratories, Inc. were used for this survey; the 3M™ Wireless Intercom System,
C1060 did not include noise reduction; the competitive digital intercom system did include noise reduction. Results
showed that 91% of the QSR employees surveyed preferred the 3M™ Wireless Intercom System, Model C1060
over the competitive digital intercom system.
SYSTEMS TESTED
Two manufacturers’ systems were tested:
Model
Base Station
Serial #
3M
3M C1060 Wireless
C922AA
0922005932
Competitive
Digital
Wireless IQ 6000 07F00339
Table 3: Models Tested
Conditions:
▪ Manufacturers’ new, standard, out-of-box intercom systems
▪ Systems installed per manufacturers’ recommendations
▪ Demonstration recordings used in the survey above were fully calibrated and created under identical
conditions by Orfield Laboratories, Inc.¹, an independent sound testing company.
CONCLUSIONS
In terms of speech intelligibility scores in the presence of background noise and similar noise reduction settings,
3M’s system performed similarly (i.e. neither significantly better or worse) to the competitive digital intercom
tested. All units had excellent intelligibility when tested in the absence of noise. The sound/listening survey results
concluded that 91% preferred the 3M™ Wireless Intercom System, Model C1060..
¹ Orfield Laboratories, located in Minneapolis, MN, is a multi-disciplinary laboratory serving North American and
international clients. They provide services in acoustics vibration, vision, lighting, architecture and market
research. Orfield is unrivaled in the extensive use of objective and subjective methods, offering design, research
and testing services and solutions for corporate and architectural clients since 1971. The firms’ projects and
research have been broadcast on television and featured in the Wall Street Journal, Architecture, Sound &
Communications, Sound & Vibration, Lighting Application, Contract and Appliance Manufacture
Magazine.