Your browser is out-of-date!

Update your browser to view this website correctly. Update my browser now



Ontario’s PEOC Updates Audio Systems

Mission-critical voice lift system

Ontario’s Provincial Emergency Operations Centre (PEOC), with Lectrosonics ASPEN Processors installed by Sight N Sound, Inc.

RICHMOND HILL, Ontario — The Ontario Provincial Emergency Operations Centre (PEOC) recently upgraded its audio systems by installing seven Lectrosonics Aspen Series audio processers to manage an extensive voice-lift and headphone monitoring system. Performing the installation was Sight N Sound Design, a Canadian audiovisual consulting, design and project management company. The emergency management command center, located within Toronto’s new $497 million Forensic Services and Coroner’s Complex, is initially being deployed for the Pan American Games — the world’s third largest international multi-sport competition — in summer 2015.

Designed to provide centralized coordination of the Ontario government’s response to major emergencies and other events, the PEOC is staffed 24 hours a day and constantly monitors situations developing inside the province and beyond its borders. The command center is equipped with a 75-foot, 30-screen video wall and 24 ceiling speakers, and houses workstations for 82 participants.

Since each workstation position also includes a local loudspeaker plus an Audio-Technica gooseneck microphone, any number of which may be activated simultaneously, the PEOC uses five Lectrosonics Aspen SPN1624 16 input/24 output processors to optimize speech intelligibility and to eliminate feedback in the voice lift system. The system is combined with a Lectrosonics Aspen SPNDNT Dante networked processor plus an Aspen SPN16i input expander and 18 DNTWP multi-I/O Dante audio interface wall panels, which together support individual source selection of various media, including television and computer-based audio, at each workstation.

According to Ken Lewis, president and founder of Sight N Sound, the key to successfully managing the PEOC voice list system is the implementation of a mix-minus feed, generated by the Lectrosonics processors, at each station.

“All the microphones are mapped to various ceiling speakers, which are all home runs in separate zones, and all the desk speakers, so that we can achieve matrix mapping of every microphone,” Lewis said.

By generating and processing an individual mix for each workstation that includes all of the microphones in the room minus the one at the corresponding position, anybody can be heard or speak with good speech intelligibility, without any recirculated audio feedback.

“What really helps us in our work is the adaptive proportional gain mixing algorithm that Lectrosonics has a patent on; we depend very much on that mixing algorithm,” Lewis said. “We’re always trying to achieve a state where anybody in a space will hear any participant who’s meant to speak and is equipped with a microphone as if they’re one meter away.”

The PEOC also benefitted from the latest evolution of a custom control panel design developed by Sight N Sound for a previous job.

“We originally developed that panel for a courthouse project in Thunder Bay,” said Lewis. “At the PEOC we have 20 cable TV boxes, a satellite receiver and computers carrying audio. We’re taking those audio feeds into our Lectrosonics Dante matrix switching system. Each participant has a single-muff headset and from the touch panel can select whatever channels they need for that particular event.”

Lewis has fine-tuned the design of Sight N Sound’s voice-lift systems during the implementation of more than 500 courtroom A/V projects throughout Canada and in Bermuda over the last few decades.

“In all our mission critical voice-lift system applications, we’ve always used Lectrosonics processors, from their first AM series, to the DM, through to the Aspen series,” he said. Courthouse A/V systems can be complex, often comprising a combination of voice lift and recording, language interpretation, assistive listening, remote testimony and audio conferencing, as well as various video, lighting and other systems.