A collapsible steering assembly features a steering mechanism and a pedal assemble united and supported together by a support structure as a unitized module for shipping and attachment to a vehicle. The invention thus relates to the plants, seeds and tissue cultures of the variety CV931026, and to methods for producing a corn plant produced by crossing a corn plant of variety CV931026 with itself or with another corn plant, such as a plant of another variety. The processor combined with each sensor a respective electronic circuit includes a digitized mounted in cascade for digitizing the amplified signal around a predetermined frequency, associated with a mechanism for limiting the digitization to a time window starting before the acoustic waves reach a sensor and ending when the acoustic waves have reached said sensor.