Simon Fraser University investigates spatial audio with Renkus-Heinz

A total of 128 CX41 two-way coaxial model speakers Renkus-Heinz facilitates the immersive and spatial audio research projects of this Canadian university's new acoustics laboratory.

Reference among the main research institutions in Canada, the Simon Fraser University (SFU) has taken another step in terms of immersive communication y spatial acoustics processing with the creation of a specific laboratory, equipped with 128 Renkus-Heinz C series loudspeakers.

In line with its commitment to take advantage of technology for the benefit of society, This university has received a subsidy for the start-up of a new laboratory audio, focused on 3D multimedia applications, like surround sound, spatial video and acoustics, to support research in this field.

This project, led by teacher Rodney Vaughan, has had the collaboration of companies specialized in audio, as Renkus-Heinz, TiMax , Advanced Audio , DirectOut e Innosonix Technologies, although it has taken several years to become a reality until financing is obtained,

As you remember Tim Bartate, TiMax senior developer, “Rodney Vaughan is known for his expertise in radar and advanced antenna design.. For this project, I was sure that the equations for sound, even if it was a different medium, "They would work in a similar way to those used in their previous research.".

The new laboratory has as its core two TiMax spatial processors, selected for their great functionality and spatial flexibility, fundamental characteristics for the range of experiments planned therein, like the simulation of complex sound fields and proof of concepts noise cancellation.

In addition to the 128 model speakers Renkus-Heinz CX41, a compact bi-directional coaxial device, The laboratory has the same number of Advanced Audio microphones, all of them integrated over a Dante network to offer fluid communication between components.

The acoustic consultant Fred Gilpin has been responsible for designing the physical configuration of the laboratory. “He took care of the precise placement of the speakers. we have some eight kilometers of custom wiring in the room, and their work was essential because each microphone and speaker had to be precisely located to guarantee accurate sound reproduction.”, Subraya Bartoo.

The CX41 4” two-way coaxial speakers were the ideal choice for the laboratory, given its compact size and sound performance. With extended range soft dome tweeters, These devices offer a smooth, low distortion sound, capable of reaching frequencies higher than 20 kHz.

“I had worked with Renkus-Heinz before and knew the CX41s would be perfect for this project,” adds Gilpin.. Phase response was crucial, since much of the sound being tested is off axis, and the natural and transparent sound of this model made it an excellent option”.

The full conical horn technology Renkus-Heinz also played a critical role in ensuring uniform coverage throughout the lab. This advanced design provides a constant beamwidth over a wide frequency range, which eliminates the typical problems with these systems, such as polar pattern distortion.

“One of the most exciting projects we are working on is create a sound canceling room -explica Vaughan-. Imagine a corner of this space where two people can have a conversation and no one outside can hear it thanks to the acoustic insulation.. Or an area where nothing can be heard, even in a noisy environment. “This type of innovation has not been done before”.

Another area of ​​interest for the laboratory is improvement of room acoustics, particularly in environments with excessive reflection. By using advanced modeling and sound field control, researchers hope develop systems that analyze it and compensate for excessive reverberation, improving intelligibility and sound quality in difficult spaces.

In addition to these innovative research projects, Bartoo is especially involved with testing the new TiMax reverb subsystem in the laboratory of this university.

“We have incorporated four engines that can create dynamic, localized reverberation in different parts of the room -details-. With lab setup, we can simulate anything, from a cavernous cathedral to a reduced and controlled acoustic space. “It will be fascinating to see how well these reverb patterns replicate reality in such a controlled environment.”.

The laboratory has sparked interest from the academic and research communities, and there is numerous proposed projects. “We recently completed our first recording of 128 channels -Bartoo reveals-. We walked around the room talking and applauding.; when we played it you could identify exactly where the sounds were coming from. when you closed your eyes, you could visualize who was where in the room. It's quite interesting.".