Andrew Draudt Email & Phone Number

Chelmsford, Massachusetts

Inventive research for government funded engineering challenges. Hearing-related tech, speech intelligibility, middle-ear surgical device. Ultrasound, vibrations, dynamic systems, NDT.Procure and manage grant projects.

Greater Boston Area

Researching acoustics and algorithms related to sensor applications, and developing acoustic and electromagnetic sensors.

Waltham, Ma

Produced algorithms for ground-breaking acoustic imaging systems. Researched and modeled acoustic imaging for NDT. Designed ultrasonic probes.

Billerica, Ma

• Modeled and designed damping for sensitive opto-acoustic resonance spectrometer.• Experimented to correlate jet noise with IR spectral output.

Billerica, Ma

• Designed linear-motion generators. Wrote multiphysics model, with treatment of nonlinear core material and flux leakage, and used this to optimize designs over multiple parameters.• Reduced total acoustic output of linear petrol engine by >40dB, including modeling custom elements and design of a muffler system. Made a reverberation room. •Designed compressible flow fuel delivery and actuation devices for piston engines.

Researched and modeled cMUT chip-based ultrasonic transducers for through-air acoustic power transmission.

• Solved problems related to focused ultrasound surgery. Researched the process of thermal destruction of tumors with ultrasound. Published and presented results on lesion detection using acoustic elastography and acousto-optic imaging. Discovered a nonlinear acoustic effect in elastography, and published a technique to mitigate the problem (patent in process). • Gained solid understanding of mechanical engineering (thermodynamics, acoustics and vibration, solid and fluid mechanics), medical ultrasound, and advanced mathematical analysis and signal processing.• Wrote extensive Matlab and C++ code for data handling, analysis, and instrument control. Conducted independent experimentation, designed and built apparatuses for measurement and testing. Designed optical systems using an interferometric acousto-optic technique.• Planned a multi-year research program, and dealt with complex multi-faceted problems.see Education section for link to thesis.

• Researched transduction and acoustics of a new product direction for the company, employing modeling, mathematics, and measurement. Knowledge was used in new product design.• Optimized transducer efficiency and sound quality using combined mechanical, acoustic and magnetic modeling.• Measured and analyzed vibration and sound fields, using acoustic and laser Doppler methods. Employed signal processing and psychoacoustics. • Training received: Dr. Bose’s acoustics course at MIT, and a course in manufacturing trouble-shooting using statistical design of experiments.

Researched and designed a family of ultrasonic medical blood flow sensors. As sole engineer, developed the product from infancy into a major company asset. • Managed product research and development, including supervision of other engineers and manufacturing personnel. Liaised with doctors and major medical manufacturers in designing custom OEM products, including a probe to measure hydrocephalic shunt flow, using coils to inductively couple signal through skin. FDA medical product compliance, ISO 9000.• Designed piezo-electric transducers for efficiency and stringent linearity requirements. Optimized vibration modes using FEM and lumped-element modeling, for which I wrote a Matlab KLM model. Discovered new materials for facing layers and acoustic media.• Researched ultrasonic field production, propagation and scattering from fluid flow. Wrote ray-tracing software for acoustic propagation through solids and fluids.• Designed complete flow-measuring devices, involving plastics, metals, and ceramics, using numerous manufacturing methods; CAD design, machining, injection mold design, CNC machining, sheet metal.

Phd, Mechanical Engineering

Thesis: “ Evaluation of Harmonic Motion Elastography and Acousto­Optic Imaging for Monitoring Lesion Formation by High Intensity Focused.

Bs, Applied Physics