Sound from Ultrasound¶

Sound from ultrasound refers to the generation of audible sound from modulated ultrasound.

Version: v1 · 2026-09-28 · History
Domain-specific #: 12174
Domain group: Natural Sciences
Origin domain: Physics
Subdomains: Nonlinear Acoustics, Parametric Arrays → Physics

Core Idea¶

Sound from Ultrasound is treated here as the recurring natural science, engineering, and health identity summarized by this source-grounded definition: Sound from ultrasound refers to the generation of audible sound from modulated ultrasound. Sound from ultrasound refers to the generation of audible sound from modulated ultrasound. In the first, modulated ultrasound propagates through a nonlinear medium, which acts as a passive demodulator, producing audible sound without an active element; This is the principle underlying parametric arrays.

Scope of Application¶

Audio Spotlight. Audio Spotlight has also been used in out-of-home advertising applications, including digital signage and billboard installations, and was discussed in a 2021 interview with Pompei on the Connecticut Public Radio program.
AudioBeam. There is no indication that the product has been used in any public applications.
Parametric array. This technology allows a beam of sound to be projected over a long distance to be heard only in a small well-defined area; for a listener outside the beam the sound.
Parametric array. This effect cannot be achieved with conventional loudspeakers, because sound at audible frequencies cannot be focused into such a narrow beam.
Active Modulation. A distinct mechanism for generating audible sound from ultrasound employs active modulation inside the transducer itself, contrasting with the nonlinear self-demodulation of a propagating beam as used in parametric arrays.

Clarity¶

A clear use of Sound from Ultrasound names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is Sound from ultrasound refers to the generation of audible sound from modulated ultrasound. The strongest recognition evidence in the frozen account is: Most of the work was performed in liquids (for underwater sound use).

Manages Complexity¶

Sound from Ultrasound compresses multiple natural science, engineering, and health details into a stable diagnostic relation. The source shows both the central mechanism—these harmonic copies are largely attenuated by the natural losses at those higher frequencies when propagating through air.—and the practical consequence—this technology allows a beam of sound to be projected over a long distance to be heard only in a small well-defined area; for a.

Abstract Reasoning¶

Type the carrier. Identify the natural science, engineering, and health entities to which the claim applies.
State the relation. Use the source-grounded identity: Sound from ultrasound refers to the generation of audible sound from modulated ultrasound.
Check operation and conditions. Since the early 1960s, researchers have been experimenting with creating directive low-frequency sound from nonlinear interaction of an aimed beam of ultrasound waves produced by a parametric array using heterodyning.
Demand recognition evidence.

Knowledge Transfer¶

Within the home domain. Knowledge about Sound from Ultrasound transfers literally when a new case preserves the same carrier type, relation, and recognition test. Audio Spotlight has also been used in out-of-home advertising applications, including digital signage and billboard installations, and was discussed in a 2021 interview with Pompei on the Connecticut Public Radio program Audacious. There is no indication that the product has been used in any public applications. Beyond the home domain. No canonical parent is asserted for Sound from Ultrasound.

Neighborhood in Abstraction Space¶

Sound from Ultrasound sits in a sparse region of the domain-specific corpus (67^th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.

Family — Sound Transmission & Building Physics (11 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08