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Measurement capabilities for buildings include: |
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| Reverberation Time | |
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| Energy Time Curves showing reverberation times | |
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Energy -Time plots showing slow decay of sound pressure. On the left, conversation in this room is difficult at distances greater than 6 metres. Listening conditions in this room were made worse by poor PA system layout and performance. Listen to Track 10 in the audio file library to hear the effect of long reverberation time. (Audio Library) The right-hand plot shows severe flutter echoes in a studio environment. Track 4,5 & 6 in the Audio Library replicate sound outside the room, inside the room as is, and inside the room after treatment is applied respectively. (Audio Library) |
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Reverb time vs frequency plot of a troubled space measured by Easera |
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| Speech Transmission Loss (STI) & STI-Pa for Sound Systems | |
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| STI Table from TEF MLS software showing calculated reverberation time and intelligibility in octave bands plus overall evaluation. | Example from NTI “Talkbox” / Acoustilyser STI-Pa system |
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| Example from SysTune | Example from Easera |
| Time Energy Field or waterfall charts | |
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| A Waterfall plot showing 81Hz room resonance. At the top of the plot 81Hz is only 6dB higher than 90Hz. 280mS later, at the bottom of the plot it is 20dB higher. This means 81Hz is ringing on in the room while all other frequencies are decaying. | |
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| Waterfall plots from Easera - Sound System close to feedback before adjustment. | Waterfall plots from Easera - Same sound system, same volume, after adjustment. |
| Frequency Response | |
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| A 1/12 Octave real time analyzer test result. Most room analysers can not resolve greater detail than 1/3 Octave. | Recorded by Easera from a speech only system. |
| Background noise and Sound Pressure Levels | |
| Background Noise measurements are available in NC, NR or dB A format. Short term or long term logging measurements are available. | |