Horizontal acoustic transmission chamber. Chamber (3) of horizontal acoustic transmission, comprising acoustic insulation means formed by boards (4) of plasticized particles joined together, and a first and a second enclosure (1, 2) formed by the inner faces of a structure comprising two laterals (6) formed by a series of bales (5) of straw; an upper face (7) formed by a series of bales (5) on the first enclosure (1); a lower face (8); wherein the boards (4) are arranged on the inner face of the packs (5) of the first enclosure (1) and, on the lower face (8) in the first enclosure (1); means for supporting the sample (11) and first sealing means thereof, in the open connection face between the first and second enclosures (1, 2); an open front face (9), and, a rear face (10) with a particle board (4). (Machine-translation by Google Translate, not legally binding)