The International Association of Fire Chiefs is soliciting member input to a reported problem. The organization has learned of firefighters experiencing unintelligible audio communications while using a digital two-way portable radio when operating in close proximity to the low-pressure alarm of their SCBA. In addition, other common fireground noise, including powered tools, apparatus and PASS devices, may affect voice intelligibility.

This is an industry-wide issue and is not specific to any one manufacturer’s radios. There are indications that any digital voice communication product using parametric voice encoders could be affected by this problem.The problem is not related to any specific radio spectrum, as it is not a frequency of operation issue, or a particular communication standard.

Due to these reports, the IAFC board of directors has asked the Communications Committee to form a working group to work with other IAFC committees and sections and other appropriate organizations to investigate and provide recommendations to address this concern. The specific focus of the group will be to:

• Fully understand the facts and identify potential solutions that may be required.
• Facilitate industry collaboration among the communications equipment manufacturers to explore options to mitigate or eliminate this concern.
• Recommend best practices for digital portable radio use on the fireground.