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 is for Sound Systems for Emergency Purposes (SSEP) commonly known as Emergency Warden Intercommunication System (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 Purposes

Australian Standards requirements 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

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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