River Sonic Solutions

Expert Witnessing and Technical Consulting in imaging, signal processing and electronics

Dr. Chris Daft Expert Witness

Dr. Chris Daft is an award winning, Oxford Educated scientist. He is an expert witness and consultant whose areas of expertise include signal and image processing, machine learning and medical imaging. Dr. Daft has extensive Intellectual Property experience including patent development, licensing, and serving as an expert witness who has testified at deposition and trial. He is a serial inventor who holds 24 U.S. Patents with more pending. Dr. Daft holds a BA and MA in Physics from Oxford, and a Doctorate from Oxford in Materials Science. The author may be contacted at:
chris.daft@riversonicsolutions.com
+1 (415) 800-3734 office +1 (408) 806 7525 cell
River Sonic Solutions LLC 2443 Fillmore St #380-4039, San Francisco, CA 94115

Ultrasound Expert Witness: What Ultrasound is and How It Works

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What is ultrasound? "Ultra" is a Latin word meaning “beyond,” or “on the far side of,” so “ultrasound” simply means sound which is too high for humans to hear.  This is typically considered to encompass frequencies above 20 kHz (20,000 cycles per second).  The hearing of dogs and bats extends into this ultrasonic range. Ultrasound is a wave, like light or radio waves.  It’s … [Read more...] about Ultrasound Expert Witness: What Ultrasound is and How It Works

MEMS Expert Witness: What are MEMS and How are They Used in Modern Technology?

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What are MEMS? “MEMS” is an acronym standing for Micro-Electro-Mechanical Systems.  These are tiny mechanical devices which are made in integrated circuit (IC) factories.  When the technologies for electronic chips were developed, there was an unanticipated parallel benefit: the ability to precisely manufacture mechanical devices with very small features. The celebrated … [Read more...] about MEMS Expert Witness: What are MEMS and How are They Used in Modern Technology?

Biometric Security Expert Witness: How Technology and Biology Combine to Improve Security and User Experience

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What is Biometric Security? “Biometrics” refers to measurements related to human physical or physiological characteristics, such as a fingerprint.  A Biometric Security system controls access to a location, computer system or account data by sensing an aspect of an individual and matching that measurement to a database of registered users of the system. As a biometric … [Read more...] about Biometric Security Expert Witness: How Technology and Biology Combine to Improve Security and User Experience

Transducer Expert Witness: What a Transducer is and How it Works in Medical Devices

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What is a transducer? The word “transducer” comes from the Latin verb transducere, meaning “to transfer.”  A transducer transfers one type of energy to another. Modern technology uses electrical signals extensively, so today’s transducers often convert electricity into some other type of energy.  An everyday example is a loudspeaker, which produces sound waves when driven … [Read more...] about Transducer Expert Witness: What a Transducer is and How it Works in Medical Devices