Background, Motivation and Objective Post Traumatic Stress Disorder (PTSD) effects 7-8％ of Americans at some point in their lives. When pharmacological methods are ineffective, vagus nerve stimulation (VNS) may be a viable option. The vagus nerve is part of the autonomic nervous system which oversees involuntary control, such as heart hate. However, current method are invasive and expensive, and is done through surgical implantation of a commercially available programmable pulse generator device. Prior research has shown that brain neurons can be stimulated via transcranial pulsed ultrasound transducer at various frequencies. This work addresses the need for low frequency approaches to trigger nerve responses by external ultrasound. These transducers are designed to focus sound to achieve high amplitudes in small end-effector cross-sectional areas of <1mm to that we can target specific nerves in the near-field zone of the transducer. The transducers operate at low voltages of 1-10Vpp, at frequencies ranging from 50-150kHz.