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In a recess of the architecture, in which only one person can fit tight, speakers emitted the ambient noise that one hears under the bridge of April 25 in Lisbon. This traffic sound (flow of vehicles on a metal bridge, over water) has a certain ambiguity: a 'noise' close to silence, though deafening, because it contains no information; it is continuous, permanent, but the perception we have of it moves from a kind of invading buzzing to harmonic periods we have the feeling to distinguish distant and deep voices – ancient choirs or sailors' requiems. In the space of the whole room the sound is diffuse and can evoke a swarm of wasps, like an indistinct threat; when one enters the cavity one feels the vibrations of the sound in the chest like an oppression. Facing a shock mount for microphone, we feel our own voice cut, reinforcing the impression of hearing choirs – like a complaint from those who don't have the space to express themselves, who never write History. The bridge is a monument linked to political power and its overthrow: originally named after Salazar, it was renamed the April 25 Bridge after the Carnation Revolution. At the entrance to the recess we have hung a commemorative 2 euro coin of the April 25th bridge, and inside in the microphone holder a coin minted under the Salazar regime depicting this same bridge then named 'bridge' Salazar'. The two pieces here act as a title (Salazar bridge - April 25 bridge) and spatialize the shift in power perceptible by a slight modification in the perception of the same environment, like a heaviness, accompanied by a restriction of the body's physical amplitude, when one get closer from the reference to the authoritarian regime.
This red bridge of Lisbon is also an iconic structure similar to the bridge of San Francisco, common to these two cities destroyed by an earthquake (unlike in Japan, the population of these two cities are unaccustomed to tectonic activity and want to believe that the next earthquake will not happen in their lifetime). Like earthquake-resistant architectures, bridges have always been a challenge as they must be designed to withstand significant vibrations. Here it becomes a figure of the turmoil and turbulence of History.