In the past two decades, in vitro studies of human phonation have shifted from static or controlled oscillations to self-oscillating bio/phono-mimetic replicas, yielding promising results. Artificial vocal folds have high availability, affordability, and they can be reused during an extended period of time. Moreover, control and access to the vibration and airflow parameters is made easier. Finally, they are essential to better evaluate and link together the results that come from theoretical and numerical models. However, they are generally still far from representing the physiological reality of human vocal folds. Besides, few studies have focused on varying either the mechanical properties of the chosen material or the pre-phonatory strain applied to the replica to better understand their influence on its vibratory properties. In particular, only four studies have investigated the impact of changing the vocal-fold anterior-posterior strain condition on fundamental frequency of oscillation, and on subglottal pressure-airflow relationship. In this paper, we present an improved version of the testbed developed in Luizard et al. (2023), allowing both anterior-posterior elongation and medial-lateral compression. Flow-induced oscillations were characterized on a homogeneous silicone model with varying longitudinal and lateral strain conditions, and airflow rate.