Is Your Voice Intelligible In An Emergency?
 Australian Standards 1670.4 & 1851 Section 9 Requires Intelligibility Testing of all EWIS at Commissioning and every 5 years thereafter
AFE Intelligibility Testing Service for sound systems and intercom systems for emergency purposes (EWIS) AFE trained staff will attend your site with an approved Portable digital Speech Intelligibility meter, and provide you with written results.
• Portable Digital Unit
• Results in CIS, STI or PI Format
• Conforms to 1670.4, 185
COMMISSIONING - AS1670.4 - Sound Systems for Emergency
Australian Standards require as per Section 4.3.6 Intelligibility
At all places within the zone where ambient noise figures are less than 85dB(A), the speech transmission index
(STI) shall be >0.5. The rating of speech intelligibility shall be in accordance with the common intelligibility
scale (CIS) method of AS 60849, measured in accordance with Appendix A. The average speech SPL shall
not exceed 110dB(A).
A3 NUMBER OF MEASUREMENTS AND CALCULATION OF THE RESULT
The measurements shall be made at a sufficient number of representative points, which shall be detailed in the system specification, in each area of coverage.
The mean value of intelligibility, and its 95% confidence interval, over the whole area of coverage shall be calculated.
MAINTENANCE
The Australian Standards require as per
AS1851 - Part 9 - Page 106 - Section 2.19
Every 3 Years
2.19 |
Speech intelligibility |
UNDERTAKE tests to ensure intelligibility in all areas of the building meets the requirements of the Standard to which the system was installed. |
THE TEST EQUIPMENT SPECIFICATIONS
Outputs:
• RS232 port: DB9M
Accuracy:
• typically ±1%.
Display:
• Test Result & SPL readings are 3 digit via 7 segment LED readout.
Power Requirements:
• Batteries: Eight "AA" alkaline or NiCad.
• External: 12Vdc @ 500mA via 2.1mm jack.
Approvals: - CE
• Emissions: - EN 55022 B - FCC Class B
• Immunity: - EN 55024 B
Size (W x H x D); Weight:
• DSP2 - 101, x 10 1/4" x 2 V2"; 2 Ibs.
• Carry Case - 18" x 13" x 7"; Ibs.
Case Material:
• DSP2 - High Impact ABS.
• Carry Case - Anodized Aluminium
Measurement Range:
• 25Hz - 20kHz.
Inputs.
• Microphone: Balanced, XLR 3 pin receptacle
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