In September 2023, a team of acoustics researchers from Belgium and Peru published findings about Inkamisana, a stone complex at Ollantaytambo in the Peruvian Andes. They discovered that the structure’s chambers amplify specific frequencies. Water channels carved into rock produce sound patterns that travel through walls. The team called it a revelation about Inca acoustic engineering.
Three months earlier, in June 2023, Deaf architect Hansel Bauman gave a lecture at Gallaudet University, a university for Deaf students in Washington, where he described DeafSpace, architecture shaped by how Deaf people sense and move through space. His design principles start from vibration. Floors that transmit footsteps. Walls with sight lines. Surfaces that reflect or absorb sound based on how people in the building actually perceive. Bauman has been developing this work since 2005.
Nobody on the Inkamisana research team contacted a Deaf acoustician.
The researchers measured the pitch and strength of echoes using microphones and software that reads sound data. They mapped standing waves (sound patterns that repeat in the same spots) inside chambers. They concluded that builders who lived before colonial rule had deep knowledge of how sound moves through stone.
I read the paper in my flat, and the sentence that stopped me was this: the team expressed surprise that the builders seemed to have designed for the ear, not the eye. As though architecture has ever been only visual. As though a population that lived in those chambers, felt the water vibrate through rock under bare feet, slept against walls that hummed at certain hours, needed a spectrometer to know what they had built.
The surprise belongs to the researchers. It does not belong to the building.
You might say this is how research works. Someone measures what was previously unmeasured. I agree. Counting and measuring has value. The problem is not the data. The problem is the frame. The paper treats acoustic design as a hidden feature waiting for modern instruments to decode. It never considers that the people who built Inkamisana understood vibration through their bodies, and that this kind of knowledge has never stopped existing in communities whose main bond with space is not visual.
Bauman introduced the term DeafSpace to describe architecture shaped by touch and visual bearing. His collaborator at Gallaudet, architect and researcher Linda Kozma-Spence, documented how Deaf students use reflected light, motion, and floor vibration to navigate. They do not experience these as workarounds. They experience them as how space communicates.
The Inca builders at Ollantaytambo channeled water through stone to carry sound. Deaf designers at Gallaudet chose flooring materials to pass vibration through the floor. The mechanism is the same. One gets a research paper. The other gets a footnote in official building standards and guidelines.
Here is where disability economics enters. I sat in a budget review in November 2021, in a London borough council office, while a facilities manager explained why tactile flooring had been removed from a refurbished community centre. The flooring met the standard. The contractor installed it correctly. But the standard specified stud sizes for guiding people with sight loss. Nobody asked whether the floor should also carry vibration for Deaf visitors. Nobody asked because the budget line said “accessibility,” and accessibility had already been delivered. One standard, one line item, one sign-off. Done.
The budget for that flooring was £4,200. The cost to put it back with a vibration-carrying base would have been £6,800. The cost to bring in a Deaf space designer before the spec was written would have been roughly £1,500. They spent £4,200 to build the wrong floor, and the accountant marked it compliant.
Sunaura Taylor’s category of “normal” applies here with precision. The normal body that architecture serves is one that sees space and hears space through ears. A body that perceives through vibration, through touch, through peripheral motion is abnormal, and abnormal bodies get fitted in after the fact, not designed for from the start.
The Inca builders at Inkamisana did not fit things in after the fact. They designed. They carved water channels at specific depths to produce specific pitches in specific chambers. This was not an accessibility feature. This was architecture.
Bauman said something in a 2019 interview that I return to often: “Deaf architecture is not about adding something. It is about not subtracting it in the first place.” Every building starts with vibration. Concrete carries it differently than wood. Glass differently than stone. The choice to ignore this is a choice. The researchers at Inkamisana found that the Inca chose not to ignore it. They treated this as exceptional. Deaf architects treat it as obvious.
I have sat in rooms where I felt the building before I understood it. A specific corridor in a hospital in Rotterdam, January 2020, where the HVAC system created a low hum I could feel through my push rims. My hands knew where I was in that building before my eyes did. The architect did not intend this. The Inca architects at Ollantaytambo did.
The research team plans to return to Inkamisana with more sensitive equipment. They will measure what the stone already knows.