Method and system for sound detection and perception by using terahertz waves

Abstract

The invention relates to a method and a system for sensing and detecting sound by using terahertz waves. Comprising a terahertz emission source, a sound insulation box body, a gain antenna and a terahertz detector. The surface of the sound insulation box body is covered with a damping material to achieve the purpose of sound insulation. Terahertz waves are emitted by the emission source, pass through the gain antenna and then are collected to directly irradiate the surface of a sounding object or irradiate the surface of the sounding object through the sound insulation box body. And the terahertz detector measures the intensity of reflected terahertz waves and recovers the sound through a time-frequency analysis principle. According to the invention, expensive microphone array detection and an optical fiber detection method with relatively high process requirements are not needed, and the vibration state and the sound production frequency of the detected sound source are obtained by emitting terahertz waves to an unknown sound object in an environment with or without sound insulation, collecting echo data for analysis and performing time-frequency analysis on phase information. And faster and more accurate terahertz wave sound sensing and detection in a sound insulation or non-sound insulation environment can be realized.

Description

technical field [0001] The present invention relates to the field of sound detection and perception using terahertz waves, in particular to a method and system for sound detection and perception using terahertz waves. Background technique [0002] In recent decades, with the in-depth research of researchers in the fields of photonics and electronics, the research progress of ultrafast laser technology, nonlinear optical technology and microelectronic technology has made the radiation and detection technology of terahertz waves develop rapidly. . Terahertz wave is a high-frequency electromagnetic wave with a frequency range between 0.1THz and 10THz, between microwaves and infrared waves. Its wavelength is in the range of 0.03mm to 3mm. Compared with traditional microphone perception, terahertz waves have higher spatial resolution, and it can measure the detailed vibration conditions of each position of the object during the vibration process, including the central vibration...

AI Technical Summary

Problems solved by technology

The above sound detection methods all have weaknesses to varying degrees

[0004] In particular, when the sound source under test is in a sound-isolated environment, unknown sound signals cannot propagate outside the sound-isolated environment

In this case, the traditional acoustic sensor cannot collect the unknown sound signal of the sound source under test, cannot analyze the unknown sound, and cannot detect and identify it.

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