Technician
Project
Instructions:  Enter the room dimensions and choose a system to check performance.  Use the Acoustic Modeling page to customize the room's surfaces.
Room
Date
Verified
Room Information
Room Analysis
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  Length   Critical Distance (Dc)   The distance where direct sound equals that of the reverberant field at the microphone.    
  Width   Reverberation Time   The reverberation time of a room or space is defined as the time it takes for sound to decay by 60dB.   
  Height   Absorbing Surfaces   Rooms with less than 50% of absorbing surfaces will benefit from acoustic treatment.  
          Treatment   Target for improvement = 15%. 2 x 4 panels required as modeled =         
          Audio Performance          
    STI Rating       
          Internal Speakers    
Distance from Display
External Speakers
Ceiling speakers maintain a level > 75dB throughout the room.
Table Microphone
Choose a System
Ceiling Microphone
Wireless
STI Rating Chart
Camera Performance
Camera Zoom
  Excellent        Field of View 1                          
  Good        Field of View 2                        
  Fair        Individual Framing       
  Bad        Max Resolution                          
  Poor        Furthest Viewer    
Display Size Required
 
  Select Number of Microphones and Coverage   Ceiling Array Options STI Dc Array Type Frequency Response Latency Auto-Mix Latency AEC Analog Out MSRP  
  Number of mics?
  8-Beam 125Hz to 20kHz 15.9 mS 26.6 mS Yes No $4,732 Specs  
  Mic coverage?
  4-Beam 160Hz to 16kHz --- 58 mS Yes No $4,499 Specs   
          Steerable 160Hz to 18kHz 4 mS --- No Yes $4,590 Specs  
  Third Party Audio    6-Beam 60Hz to 18kHz 47 mS 79 mS Yes Yes $2,650 Specs  
          Table Mic Options STI Dc Type Frequency Response Mute LED Directivity Dante Latency MSRP  
  Use the number of microphones and coverage options for accessories and 3rd party microphones.   Wired Array 100Hz to 20kHz Multi-Color Programable Yes < 1 mS $1,474 Specs  
    Wired Array 160Hz to 16kHz R /G Programable Yes 46 mS $624 Specs   
    Project Name   Video System            
    Room                
    Date     Technician            
    Verification            
 
    About this Report                          
    The performance and use of video conferencing hardware will be impacted by a room's acoustics, size, and the use case.  This report uses standard formulas from AVIXA and an application of the American National Standards Institute (ANSI) Speech Intelligibility Index standard to estimate performance in the specified room.              
             
             
             
  1.0  Room Information                      
Critical Distance (Dc)
The distance between the microphone and the sound source at which the level of room reverberation is equal to the level of the direct sound. 
Reverberation Time
The reverberation time of a room or space is defined as the time it takes for sound to decay by 60dB. 
Absorbing Surface
Percentage of surfaces with an absorbtion value of NRC .50 or higher. 
Treatment
Material that provides an absorption value of NRC .85 or higher.  Typically, covering 15% of the room with treatment will provide a significant improvement for conferencing and benefit the overall comfort in the room. 
    Room Size                      
    Audio Analysis                           
    Speech Transmission Index (STI) is an ANSI standard to calculate microphone transmission quality or speech intelligibility over an audio or video call.  The standard uses plain language terms as a rating system.                   
             
             
STI Rating Chart 
        Excellent Good Fair Poor Bad              
           
  2.1. Internal Mic                      
  Coverage:            
         
    Pickup Area                
    No. of Mics              
                     
    Table Mic            
    Ceiling Mic            
    Wireless Mic            
  2.3 Audio Performance of 3rd Party Microphones Compatibility:            
    Ceiling Arrays     Dc Array Type Voice Lift Capable          
    Shure MXA920   8-Beam Yes          
    Yamaha RM Ceiling   4-Beam No          
    Sennheiser  TCC2   Steerable Yes          
    AT ATND1061   6-Beam No          
    Table Arrays     Dc Type                
    Shure MXA310   4-Beam Wired Yes          
    Yamaha RM-TT Table   4-Beam Wired No          
                         
  2.4 Speaker Bar              
    Performance            
Distributed Audio
3.0 Camera Performance
    3.1 FoV 1                        
    3.2 FoV 2                        
    3.3 Resolution            
  3.4 Framing    
4.0  Display Requirements & Information
4.1  Display Size
  4.2  Max Displays            
  MXA 710 Acoustical Modeling      
MXA 910 Enter the room's surfaces into acoustic modeling and note the STI rating.  You may add sound absorbing panels or change a surface to model different acoustical improvement scenarios.  If the message below says "Check % Values" all 6 surfaces do not total 100% each.  
MXA 310
Integration
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    Custom NRC Value:
 
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      Acoustic Analysis Results       
           
                       
      Treatment      
                       
Rooms with less than 50% of absorbing surfaces will benefit from acoustic treatment.  Typically, covering 15% of the room with treatment will provide a significant improvement for conferencing and benefit the overall comfort in the room.