Transcription of Voice Evacuation Systems
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Voice Evacuation Systems
APPLICATIONS GUIDEV oice Evacuation SystemsAPPLICATIONS GUIDE: Voice Evacuation SYSTEMS2 Voice EvacuationSystemsContentsSection 1: Introduction ..3 What is the driving factor for Voice Evacuation Systems ? ..3 Section 2: Basics of Sound ..3 What is sound? ..3 How does sound travel? ..3 Section 3: Measuring Sound Output ..3 Sound Pressure Level (SPL) .. Scale ..4B-Weighted Scale ..4C-Weighted Scale ..4 Adding SPL from two speakers ..4dB Rules of Thumb ..4 Section 4: Basics of Speaker Operation ..5 Cone Materials ..5 High Impedance ( Volt/25 Volt) Distributed Line Systems ..5 Section 5: Basics of Voice Evacuation system Amplifiers ..5 Section 6: Laws, Codes and Standards Relevant to Voice Evacuation Systems .
APPLICATIONS GUIDE: VOICE EVACUATION SYSTEMS 4 Decibel Audio levels are commonly used by engineers using “Decibels” (dB) to express ratios between levels, such as power, Volts, Amps, and Sound
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