Highly directional pressure sensing using the phase gradient | Zendy

Joseph S. Lawrence | Zendy; Kent L. Gee | Zendy; Tracianne B. Neilsen | Zendy; Scott D. Sommerfeldt | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Highly directional pressure sensing using the phase gradient

Author(s) -

Joseph S. Lawrence,

Kent L. Gee,

Tracianne B. Neilsen,

Scott D. Sommerfeldt

Publication year - 2018

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.5065401

Subject(s) - beamforming , bandwidth (computing) , microphone , estimator , acoustics , amplitude , phase (matter) , computer science , nyquist–shannon sampling theorem , pressure gradient , optics , physics , sound pressure , mathematics , telecommunications , quantum mechanics , computer vision , statistics , mechanics

Many methods of two-microphone directional sensing have limited bandwidth. For active intensity, finite-difference error can be removed by using the phase and amplitude gradient estimator method. Using similar principles, a directional pressure sensor based on the phase gradient is developed that is accurate up to the spatial Nyquist frequency, and beyond if phase unwrapping is applied. A highly directional frequency-independent array response of arbitrary order can be achieved with two microphones. The method is compared against beamforming and traditional gradient sensing for single and multiple sources and is found to have improved localization capabilities and increased bandwidth.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research