Home / Publications / E-library page
Only AES members and Institutional Journal Subscribers can download
Limitations of low frequency sound reproduction ability of the conventional direct-radiator loudspeakers is essential because the diaphragm of them must be driven in a mass-controlled range for a flat response. This paper proposes a novel direct-radiator loudspeaker suitable for low-frequency signal radiation. It utilizes a ultrasonic motor (USM) including a piezoelectric transducer. A velocity modulated continuous revolution is better than a reciprocal motion to avoid distortion in wave form due to the difference between dynamic and static frictional forces. A few fundamental ideas, a continuously revolving flat radiator, an air-flow modulation type without any mechanical radiator and a conventional radiator actuated by a revolving mass are compared to investigate merit of the loudspeaker proposed here.
Author (s): Negishi, Hirokazu; Ohga, Juro; Oohira, Ikuo
Affiliation:
Ashida Sound Co.Ltd; DiMagic Co.Ltd; Shibaura Institute of Technology
(See document for exact affiliation information.)
AES Convention: 119
Paper Number:6581
Publication Date:
2005-10-06
Import into BibTeX
Session subject:
Loudspeakers
Permalink: https://aes2.org/publications/elibrary-page/?id=13318
(318KB)
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 Join the AES. If you need to check your member status, login to the Member Portal.
Negishi, Hirokazu; Ohga, Juro; Oohira, Ikuo; 2005; A Proposal for Low Frequency Loudspeaker Design Utilizing Ultrasonic Motor [PDF]; Ashida Sound Co.Ltd; DiMagic Co.Ltd; Shibaura Institute of Technology; Paper 6581; Available from: https://aes2.org/publications/elibrary-page/?id=13318
Negishi, Hirokazu; Ohga, Juro; Oohira, Ikuo; A Proposal for Low Frequency Loudspeaker Design Utilizing Ultrasonic Motor [PDF]; Ashida Sound Co.Ltd; DiMagic Co.Ltd; Shibaura Institute of Technology; Paper 6581; 2005 Available: https://aes2.org/publications/elibrary-page/?id=13318