Most sculpture asks you to look. A sounding sculpture asks you to listen as well, and often to wait, because the work is only complete when something sets it moving: a hand, a gust of wind, a wave, a small electric motor.
The term is closely tied to one artist, Harry Bertoia, but the idea is much wider. Over the past seventy years, artists, architects and instrument builders have made objects whose form exists mainly to produce sound.
This guide looks at what separates a sounding sculpture from other kinds of sound artwork, the key figures and places worth knowing, and why the field matters to artists who treat their practice as research.
What makes a sculpture "sounding"
A sounding sculpture is a physical object designed to make sound through its own material and shape. The sound is not played through it from a recording. It comes from metal rods striking each other, air moving through pipes, or water pushing against a resonating chamber.
That distinction matters. A speaker hidden inside a plinth turns an object into a playback device. A sounding sculpture is closer to a musical instrument that has been freed from the concert hall, with no fixed score and often no performer.
Most works fall somewhere along a line between two poles. At one end are pieces made to be played by people. At the other are pieces left outdoors for wind, water and weather to activate, with visitors as listeners rather than players.
Harry Bertoia and the Sonambient rods
Bertoia was an Italian-born sculptor and designer who studied at Cranbrook Academy of Art in Michigan. Many people know his wire chairs before they know his sculpture, which is a pity, because the sound works occupied him for much of his later career.
According to the Harry Bertoia Foundation, he made his first prototype sounding sculptures in early 1960. The mature form is a flat metal base drilled with rows of vertical rods, loose at the top, which ring against each other when touched or pushed by air.
He varied the metal to change the tone. The foundation lists brass, bronze, beryllium copper, aluminium, Monel and Inconel among his materials, and the works range from about six inches to twenty feet tall.
In the 1970s, working with his brother Oreste, Bertoia recorded the sculptures in the barn studio at his home. The recordings were released under the name Sonambient, and eleven of those albums remain available today.
The best-known public example is the Untitled Sounding Sculpture of 1975 in Chicago, commissioned for the plaza of what was then the Standard Oil Building and is now the Aon Center. Clusters of copper-beryllium rods were set in a reflecting pool, where the breeze knocks them together. Only part of the original group is still on view today.
The Baschet brothers: instruments anyone could play
In France, the brothers Bernard and François Baschet began building what they called Structures Sonores in the early 1950s. Bernard was an engineer, François a sculptor, and together they set out to find new sounds through new forms rather than through the orchestra's existing instruments.
Their best-known invention, the Cristal Baschet, grew out of experiments with glass rods in the mid-1950s. It is played by rubbing wet fingers along the rods, and metal cones and sheets amplify the vibration into a sustained, glassy tone.
The Baschets cared about participation. Their exhibition labels invited visitors to touch, and their association still sums up their approach with the motto "artists are also researchers". They exhibited widely, including in Norway, Finland and Sweden, and built seventeen large sound structures for Expo '70 in Osaka.
Wind, water and weather as performers
Some of the most loved sounding sculptures have no human player at all. They are built into a landscape and depend on conditions the artist cannot control, which is a large part of their appeal.
The Sea Organ in Zadar, Croatia, designed by architect Nikola Bašić, opened on 15 April 2005. Beneath a flight of stone steps on the waterfront sit 35 pipes of different lengths and diameters. Waves push air through them, and the sound escapes through openings in the steps above.
In the hills above Burnley in northern England stands the Singing Ringing Tree, completed in 2006 and designed by the architects Mike Tonkin and Anna Liu. It is about three metres tall, built from galvanised steel pipes, and the wind passing over the tuned pipes produces a low, choral hum.
These works have a lot in common with the practice of environmental sound artists, who treat a site's weather, acoustics and ecology as material. The finished piece is less an object than a long collaboration with a place.
When the object disappears
At the far edge of the field are works where the sculpture becomes almost invisible. Max Neuhaus's Times Square, first installed in 1977, is a sustained, harmonic drone rising from a grate in a pedestrian island on Broadway between 45th and 46th Streets in New York.
There is no sign and nothing to look at. The work was switched off in 1992 and reinstated in 2002, and is now maintained by Dia Art Foundation, which keeps it running around the clock.
Strictly speaking, Times Square is an installation rather than a sounding sculpture, since the sound is electronic. But it shows where the tradition leads: towards soundscape art, in which the shape that matters is the shape of the listening space rather than the object.
Motors, repetition and the gallery
Indoors, without wind or waves, artists have to supply their own energy. The Swiss artist Zimoun is known for installations in which hundreds of small DC motors swing cotton balls against cardboard boxes, or set other everyday materials in motion.
Each mechanism is simple, and on its own almost trivial. Repeated across a whole room, the result is a dense, shifting texture that changes as you walk through it. This kind of experimental sound art keeps the mechanics visible, so the audience can see exactly how the sound is made.
Sounding sculpture as a research practice
For artists working in academic settings, sounding sculpture is a rich area precisely because it sits between disciplines. Acoustics, materials, engineering, architecture and listening all meet in a single object.
The Baschets' motto is not just a slogan. Building a sounding work means testing materials, tuning, recording and adjusting, which is close to the iterative method many institutions now recognise as sound art as artistic research.
The process also produces a lot of evidence worth keeping: sketches, test recordings, notes on metals and weather, measurements of a site. Planning for that from the start makes it far easier to share the work with peers, and the documentation tools artists actually use are a good place to begin.
Participation raises its own questions. A sculpture that invites touch changes how people behave around art, which links the field to wider thinking about interactive installations and audience participation.
How to listen to a sounding sculpture
If you visit one of these works, give it time. Wind-driven pieces can be silent for minutes and then suddenly fill the air, and a calm day may tell you very little about what the work can do.
Move around it. With rods and pipes, the sound changes noticeably as you shift position, and stepping closer often reveals overtones that disappear at a distance.
Notice what else you hear. Traffic, birds, water and other visitors all become part of the experience, and for many outdoor works that is exactly the point.
Finally, if recordings exist, compare them with what you heard on site. The gap between the two is one of the most interesting things about sounding sculpture: a recording captures a moment, while the object keeps playing long after you leave.
About Dr. Mira Solheim
Dr. Mira Solheim is an art historian and writer focused on artistic research, Nordic visual culture and the intersection of art with technology and film. She writes for Artistic-Research.no on methodology, institutions and practice.