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Sound artist Rutger Zuydervelt and designer Gerco Hiddink have teamed up to organize a new audio project called Bridges. The project asked a group of eight well-known improvisational musicians to "react" to four Dutch bridges (or, more accurately, to field recordings made on, under, and near those bridges). The project is thus as much about musical improv as it is about infrastructural acoustics-a structural ecology of sound vibrantly humming in the spaces around us. "

"Zvook" (звук, Ukrainian for "sound") is a project bringing together software and hardware components to identify cruise missiles, helicopters, drones, and jet fighters at low to medium heights. There are currently 40 instances of the system deployed throughout Ukraine. While operational details are scarce, the project's team says that it helps the Ukrainian military locate and destroy Russian rockets targeting civilian infrastructure."

"For centuries, skywatchers have reported seeing and simultaneously hearing meteors whizzing overhead, which doesn't make sense given that light travels roughly 800,000 times as fast as sound. Now scientists say they have a potential explanation for the paradox."

"Ethan Rose's Hum responds specifically to the Jefferson Substation, an electrical substation that is located just outside the loop of downtown Chicago. The step down transformers at the Substation emit an audible 60 cycle hum. This rich harmonic drone permeates the surrounding city blocks. For this site-specific radio broadcast, installation, and performance, Rose assembled a small choir of vocalists who will be positioned at a near distance to the transformers. The choir hums the overtone series in harmony with the transformer's buzz."

"The idea is to highlight the physical nature of 'cloud computing' and to remind people that whilst their phones might be sat silently in their pockets, somewhere out there, a huge hive of hard drives and fans is spinning around frantically; managing our digital identities."

"Capilano Breakhead Tank Music Performance, Immersion"

Janette Sadik-Khan helped shape the urban soundscape of NYC

"Organ of Corti is an experimental instrument that recycles noise from the environment. It does not make any sound of its own, but rather it attempts to draw our attention to the sounds already present by framing them in a new way. Named after the organ of hearing in the inner ear, it uses the acoustic technology of sonic crystals to accentuate and attenuate frequencies within the broad range of sound present in road traffic or falling water. By recycling surplus sounds from our environment, we hope to challenge expectations of what might constitute a piece of music by adding nothing to the existing soundscape but rather offering new ways of listening to what is already there. This instrument is a device that, for us, rematerializes our experience of sound, inviting us to "listen to ourselves listen"."

"In 1983, the Brooklyn Bridge made continuous sounds created from the oscillating drones of cars moving over a steel grid roadway, which later was silenced in the late 80's by being paved over by blacktop."

"This 9-channel sound, light & smoke installation was created in collaboration with the independent sonic arts collective Call & Response, Sep 2015 London Subterraneous takes the work of seventeenth century alchemist and scientist Athanasius Kircher as inspiration. Kircher was a polymath and inventor, who researched fields as diverse as medicine and Egyptology, and designed and constructed wondrous sound and vision automatons. These included a collection of so called speaking statues whose spiral mouths would lead out into the streets of Rome like giant trumpets. In this way the speaking trumpets or 'hearing lens' would reveal the cacophony of Rome to the listener. London Subterraneous aims to link Kircher's 'speaking trumpets' with his fascination of geology and underground reverberations and find a way to explore London's mundus subterraneous For this project, special microphones have been used to access sounds from a series of "stink pipes" that connect the city's familiar terrestrial environment to a lesser-known complex network of sewers and rivers below. The towering, hollow pipes, now rusting fixtures dotted across London erected as safety valves to vent excess toxic gases along a newly built Victorian sewer network in the 1860's allow us to connect through our past and eavesdrop on the capital's underground world. The resultant exhibition is a portrait of some of the sounds created below ground and through the pipes themselves "Although these stink pipes are nowadays "useless" this work aims to reveal them as poles of sound, or as singing flutes. In a way these are tones from the past." Jacob Kirkegaard"

"New Yorkers gathered on the shores of the East River to hear musicians - aboard a barge and canoe - taking advantage of the unique acoustics of a drainage tunnel."

"I gave a talk on my Masters Thesis Project in Architecture focusing on Altering Soundscapes in Exterior Environments using Helmholtz Resonators in Ceramic Bricks to absorb Low Frequency Traffic Noise."

"There is a parallel city beneath our feet, connected by pipes and caverns, carrying rainwater, electricity, (un-)sanitary waste, and utilities. In St. Paul, It has been carved into the limestone rock for over a hundred years and extends for many miles. Above-ground pedestrians rarely notice the openings--manholes, gratings, and outfalls--and can barely imagine the subterranean spaces. That is where sound comes in: ears can judge volume,materials, shapes, and space better than eyes, in this case."