AES E-Library

AES E-Library

High Power Efficiency and Broad Flat Radiation Bandwidth of a Parametric Array PMUT Loudspeaker

Parametric Array loudspeakers can generate a sound beam using nonlinear acoustic interactions, widely known as “Parametric Array,” that can enable private listening in a public area. Parametric array loudspeakers can be applied to many applications, such as information technology devices, that require a high power efficiency and wide bandwidth. In a previous study, a piezoelectric micro-machined ultrasonic transducer (PMUT) is shown to be an efficient unit for a parametric array loudspeaker. In this paper we will describe realization of a parametric array loudspeaker with high power efficiency (up to 71%) and wide flat radiation bandwidth (19.5 kHz, difference frequency wave with equalization), which consists of an array of PMUTs with two resonance frequencies (f1 = 100 kHz, f2 = 110 kHz) and use of “out-of-phase” driving techniques.

AES Convention: Paper Number:
Publication Date:

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.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

AES - Audio Engineering Society