Final answer:
Ultrasound technology is used for simultaneous audio recording of speech. It uses high-frequency sound waves to generate an echo signal that is converted into a real-time image of anatomy and physiology.
Step-by-step explanation:
Simultaneous audio recording of speech is done with the use of ultrasound technology. Ultrasound uses the transmission of high-frequency sound waves into the body to generate an echo signal that is converted by a computer into a real-time image of anatomy and physiology. It is the least invasive of all imaging techniques and is commonly used to monitor pregnancies.