Tensors of vocal cord are:
Cricothyroid is the main tensor of vocal cords. Another tensor of VC is the internal or medial pa of thyroarytenoid which is also known as Vocalis.
Posterior cricothyroid, internal interarytenoid
Lateral cricothyroid, internal interarytenoid
Thyroarytenoid, internal interarytenoid
Cricothyroid and internal thyroarytenoid
Anatomy of Larynx