What technique involves creating an image of the articulators using sound waves?

The technique that involves creating an image of the articulators using sound waves is ultrasound. This method utilizes high-frequency sound waves to capture real-time images of soft tissues, including the articulators such as the tongue and lips during speech production. By sending sound waves into the body and recording the echoes that bounce back, ultrasound allows for visualization of how these structures move and interact without the need for invasive procedures.

Ultrasound is particularly advantageous in speech science because it provides valuable insights into the dynamic process of speech articulation. Researchers can analyze different speech sounds, assess articulatory patterns, and observe real-time movement of the vocal tract, which helps in understanding speech production mechanisms.

The other techniques listed, such as laryngeal mirrors, cinematography, and endoscopy, do not rely on sound waves for imaging. Laryngeal mirrors involve direct observation of the larynx, cinematography refers to the technique of capturing motion through film, and endoscopy utilizes a flexible tube with a camera to visualize internal structures but does not use sound waves to create images. Therefore, ultrasound stands out as the only technique mentioned that effectively uses sound waves to create images of the articulators.