We present a new omni-directional sound source using facing ultrasonic transducer arrays. Ultrasonic transducers have been studied for sensors in acoustic sensing, arrayed parametric loudspeakers, or non-contact manipulation. In this research, ultrasonic transducer arrays are placed face-to-face on a straight line, and the arrays radiate sound with different ultrasonic frequency each other from both sides. Then the audible sound with differential frequency of the ultrasound signals is omni-directionally emitted. In this report, we fabricated sound source employing a facing ultrasonic transducer array, and evaluated the frequency characteristics and directivity of the sound source experimentally. This result suggests that it is possible to produce simpler, smaller, and light-weighted omni-directional loudspeakers with higher design like a ring and polyhedron.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.
The Engineering Briefs at this Convention were selected on the basis of a submitted synopsis, ensuring that they are of interest to AES members, and are not overly commercial. These briefs have been reproduced from the authors' advance manuscripts, without editing, corrections, or consideration by the Review Board. The AES takes no responsibility for their contents. Paper copies are not available, but any member can freely access these briefs. Members are encouraged to provide comments that enhance their usefulness.