Harmony in the Canyon: The Biophilic Instrument Pavilion

Professor Thomas Fowler IV, FAIA, DPACSA, NCARB

Award-winning architect and educator whose work explores the intersection of community, craft, and multisensory design. Over his distinguished career, Fowler has earned recognition with an AIA/ACSA Practice Leadership Award, a SARA (Society of American Registered Architects) National Award, Fellow of the American Institute of Architects, Distinguished Professor at Cal Poly, San Luis Obispo, and Distinguished Professor of the Association of Collegiate Schools of Architecture. His excellence in teaching was honored with the California State University’s Wang Teaching Award, one of the highest recognitions in the CSU system.

Fowler’s scholarship spans multiple scales and contexts—from collaborating on an ongoing design-build college project in Tanzania, Africa, to partnering with industry to create innovative learning opportunities for architecture students, including projects involving skyscraper design on multidisciplinary teams. His approach consistently emphasizes small-scale, multi-sensory community design-fabricate-build projects that bring together diverse teams of students, faculty, and industry partners. Under his mentorship, students have received numerous design competition awards, reflecting his commitment to excellence and innovation in architectural education.

When Nature Becomes Music: An Interdisciplinary Installation Transforms a California Canyon into a Living Instrument

In the serene expanse of Poly Canyon, San Luis Obispo, a remarkable fusion of architecture, engineering, and music has taken root. The Biophilic Instrument Pavilion (BIP) stands as a testament to what happens when disciplines converge with a shared vision: to transform the relationship between humans and their natural environment into a tangible, multisensory experience.

This isn’t merely a structure that sits in the landscape—it is an active participant in it, sensing sunlight, wind, and human movement, then translating these ephemeral phenomena into real-time sound and light. Designed and built by an interdisciplinary team from Cal Poly, the pavilion demonstrates how biophilic design principles and responsive technology can deepen our connection to a place while maintaining a sustainable, low-impact footprint.

The Concept: Where Design Meets Ecology

At its core, the Biophilic Instrument Pavilion embodies the principle of biophilia—the innate human affinity for the natural world. Rather than simply incorporating natural elements into built environments, the BIP team reimagined the entire structure as an active instrument that sonifies environmental phenomena.

The project had three guiding principles: reinforce embodied connections to the canyon through responsive materials and form, treat the pavilion as an instrument that gives voice to light, wind, and visitor movement, and embrace adaptive reuse to minimize environmental impact. By repurposing an existing structure called the Centering Center, originally designed for a 2021 music event at Descanso Gardens, the team reduced their material footprint while creating something entirely new.

Origins: A Structure Designed for Circularity

The pavilion began its life in 2022 as a portable structure designed by a multi-disciplinary team of 12 for a local musical festival. In 2024, it was deinstalled and reimagined on California’s central coast as the interactive biophilic instrument it is today. This transformation involved a team of 6 who prototyped systems to sonify environmental forces—wind, water, and sun—using solar-powered electronics and natural acoustics.

Built on principles of circularity, the 16-foot diameter Douglas Fir dome features friction-fit components designed for easy assembly and transport. Through clever engineering, the team reduced component pieces from 308 to 84 by standardizing sizes and using only 4 types of multi-angled nodes with finger joint connections. The vinyl skin pattern was inspired by California’s native Dudleya succulent plant.

The biophilic instrument components include acoustic and solar-powered electronic devices that respond to wind (Aeolian harp), daylight (camera-based systems working with dichroic prisms), and motion (ultrasonic sensors). Incorporating secondhand materials and relying entirely on solar power, the pavilion embodies an off-grid, sustainable vision that combines spatial, audio, and tactile qualities to enhance ecological awareness and healthy living.

A Process Rooted in Place

Before any construction began, the team immersed themselves in the canyon’s existing soundscape. Field recordings of birdsong, rustling wind, flowing water, and distant wildlife informed every decision about sensor placement and sonic behavior. The goal was not to overpower the natural acoustic character of the site, but to complement and amplify it.

Physical prototyping played a crucial role in the design process. The team created 1/8″ scale models to test how shadows would move across the structure and how dichroic vinyl sails would behave optically throughout the day. These careful studies ensured that the final installation would perform as intended—both visually and sonically.

Architectural Design: Prisms and Light

Visually, the pavilion is defined by strategically placed dichroic vinyl sails that refract and reflect sunlight, producing moving colored shadows that dance across the structure and surrounding landscape. These “prism sails” serve multiple functions: they create the visual spectacle that draws visitors in, they generate the color data that feeds the Hue sonification system, and they demonstrate how simple materials can create profound sensory experiences.

The fabrication process merged digital precision with traditional craftsmanship. Custom aluminum connection joints were produced through an innovative pipeline: Rhino modeling led to 3D-printed patterns, which were then used in lost-wax investment casting to create lightweight, precise cast elements capable of mounting the prism modules on the wooden frame. This combination of cutting-edge and time-honored techniques proved essential for achieving the structural alignment and optical behavior the design required.

During the day, these sails filter natural light, creating shifting color fields that evolve with the sun’s position. At night, modest internal lighting transforms the sails into a glowing chandelier, maintaining the pavilion’s nocturnal presence and extending visitor engagement beyond sunset

The Technology: Miles and Hue

To give the pavilion its voice, the team developed two distinct solar-powered sensor systems that work in concert to create a continuous, responsive soundscape

Miles, the movement sonification system, uses ultrasonic sensors paired with a teensy microcontroller to convert visitor motion into dynamic audio events. As people approach the structure, move through it, sit within it, or interact with specific elements, Miles responds, creating a sonic layer that makes human presence audible within the landscape.

Hue, the light and color sonification system, employs a camera with Raspberry Pi processing to map the changing daylight conditions and color shifts from the dichroic sails into evolving sonic textures. As clouds pass overhead, as the sun moves across the sky, as shadows lengthen and colors shift, Hue translates these visual phenomena into sound.

Both systems run entirely off-grid, powered by integrated solar arrays. The audio output is routed to on-site speakers and amplifiers, allowing the electronic soundscape to layer organically with the ambient sounds of the canyon. The result, as visitors have described it, is the embodied “voice of the canyon”—a sonic presence that feels both technological and deeply natural.

The Visitor Experience

The pavilion offers distinct experiences depending on when you visit. During daylight hours, moving dichroic shadows create shifting color fields across the structure and ground. Hue maps these light variations into evolving soundscapes that change by the minute, making each visit unique. Visitors find themselves enveloped in colored light while surrounded by responsive audio layers that react to both their movements and the changing environment.

At night, the experience transforms. Low-power electronics and the illuminated chandelier maintain the pavilion’s presence after sunset, creating an intimate, contemplative atmosphere that invites quiet interaction with the canyon’s nocturnal character.

A Multidisciplinary Achievement

The success of the Biophilic Instrument Pavilion lies in its genuine interdisciplinary collaboration. The project brought together students and faculty from architecture, construction management, electrical and computer engineering, and music—each contributing essential expertise while learning to speak across disciplinary boundaries.

The Team:

• Faculty Leaders: Thomas Fowler (Architecture) and Julie Herndon (Music)
• Student Designers: Joseph Galicinao, Eddie Sanchez-Pascua, Anita Shanbhogue, Drew Thomas, and Sloan Woodward

The collaboration wasn’t always easy—interdisciplinary work rarely is—but the results speak for themselves. As team member Eddie Sanchez-Pascua reflected, “Interdisciplinary work is an incredible feat… this project is proof that it is worth pursuing.”

Significance and Future Directions

The Biophilic Instrument Pavilion offers more than an engaging visitor experience. It demonstrates a scalable model for future installations that seek to interpret and amplify local ecologies. The fabrication pipeline—combining digital modeling, 3D printing, and traditional casting—provides a repeatable method for producing precise custom hardware for site-responsive projects.

More fundamentally, BIP expands what biophilic design can mean. By making environmental conditions legible through sound and light, the pavilion moves beyond aesthetic considerations to create an experiential instrument that heightens ecological awareness. It proves that sustainable, low-impact installations can still deliver powerful, transformative experiences.

The pavilion stands as a compact demonstration of how adaptive reuse, responsive electronics, and carefully chosen materials can transform a simple shelter into a living instrument—one that invites us to listen more closely to the world around us and recognize our place within it.

Credits

The Centering Biophilic Pavilion

By Design Collaboratory, San Luis Obispo, CA
Design Collaboratory Team

Advisors:

Thomas Fowler IV, FAIA, DPACSA – Kevin Dong, PhD, SE – Julie Herndon, Assistant Professor of Music

Instrumentation:

Joseph Galicinao, Eddie Sanchez-Pascua, Anita Shanbhogue – Drew Thomas – Sloan Woodward

Fabrication:

Adam Albanese – Lucas Brown – Edgar Pena – Olek Piechaczek – Ryan Scharf

Design:

Sam Buckman – Bryan Garcia – Eric Jeschelnik – Deniz Karadere – Jonathan Oberempt – Nicole O’Connor – Faith Sharp – Nishat Subah Peau – Nicole Svillich – Saksham Tikekar – Laetita Wallmann – Elijah Williams 

Clients:

Cynthia Campoy Brophy – Marcos Lutyens