var m_ctl = require("controls");
    var m_scs = require("scenes");
    var m_sfx = require("sfx");

    var speaker = m_scs.get_object_by_name("YOUR_SPEAKER_OBJECT_NAME");
    var beer_can = m_scs.get_object_by_name("YOUR_BEER_CAN_OBJECT_NAME");
    var sensor = m_ctl.create_collision_sensor(beer_can, "YOUR_MATERIAL_COLLISION_ID", false);  

    var callback = function(obj, id, pulse, param) {
        m_sfx.play_def(param);
    }
    m_ctl.create_sensor_manifold(null, "SOME_UNIQUE_ID", m_ctl.CT_SHOT,
            [sensor], null, callback, speaker);