著者

Junichi Yamagishi Christophe Veaux Simon King Steve Renals

出版者

ACOUSTICAL SOCIETY OF JAPAN

雑誌

Acoustical Science and Technology (ISSN:13463969)

巻号頁・発行日

vol.33, no.1, pp.1-5, 2012-01-01 (Released:2012-01-01)

参考文献数

23

被引用文献数

25 55

著者

Hideo SUZUKI

出版者

ACOUSTICAL SOCIETY OF JAPAN

雑誌

Acoustical Science and Technology (ISSN:13463969)

巻号頁・発行日

vol.21, no.3, pp.163-166, 2000 (Released:2001-01-31)

参考文献数

2

被引用文献数

2 4

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A single-degree-of-freedom(SDOF) system with a mass(m), a spring(k), and a damping(c) is a basic mechanical system.It is well known that a complex mechanical system is represented by a combination of infinite number of SDOF systems.The modal analysis theory is based on this principle, but only one type among various types of SDOF systems is presently employed for a modeling of complex systems.When one needs to estimate m, k, and c of a SDOF system from the measurement of the resonance frequency and the loss factor, the relationships between them must be exactly known.Those relationships are known for commonly used SDOF systems, but those for rather unfamiliar types are not known.In this technical report, various types of SDOF systems and their equivalent electrical circuits are listed, and equations that relate the resonance frequencies to the undamped resonance(natural) frequencies and the loss factors are given.It is also shown that, for some type of SDOF systems, some cares must be taken how to interpret the loss factor.

著者

Hideki Banno Hiroaki Hata Masanori Morise Toru Takahashi Toshio Irino Hideki Kawahara

出版者

ACOUSTICAL SOCIETY OF JAPAN

雑誌

Acoustical Science and Technology (ISSN:13463969)

巻号頁・発行日

vol.28, no.3, pp.140-146, 2007 (Released:2007-05-01)

参考文献数

19

被引用文献数

11 28

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A very high quality speech analysis, modification and synthesis system—STRAIGHT—has now been implemented in C language and operated in realtime. This article first provides a brief summary of STRAIGHT components and then introduces the underlying principles that enabled realtime operation. In STRAIGHT, the built-in extended pitch synchronous analysis, which does not require analysis window alignment, plays an important role in realtime implementation. A detailed description of the processing steps, which are based on the so-called “just-in-time” architecture, is presented. Further, discussions on other issues related to realtime implementation and performance measures are also provided. The software will be available to researchers upon request.

著者

Takayuki Arai

出版者

ACOUSTICAL SOCIETY OF JAPAN

雑誌

Acoustical Science and Technology (ISSN:13463969)

巻号頁・発行日

vol.29, no.2, pp.188-190, 2008-03-01 (Released:2008-03-01)

参考文献数

13

被引用文献数

3 3

著者

Ken’ichi Miyazaki

出版者

ACOUSTICAL SOCIETY OF JAPAN

雑誌

Acoustical Science and Technology (ISSN:13463969)

巻号頁・発行日

vol.25, no.6, pp.426-432, 2004 (Released:2004-11-01)

参考文献数

55

被引用文献数

14 19 25

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Absolute pitch (AP) is the ability based on the fixed association between musical pitch and its verbal label. Experiments on AP identification demonstrated extreme accuracy of AP listeners in identifying pitch, influences of timbre and pitch range, and difference in accuracy between white-key notes and black-key notes. However, contrary to the common belief that AP is a component of musical ability, it was found that AP listeners have difficulty in perceiving pitch relations in different pitch contexts, and in recognizing transposed melodies, as compared to listeners having no AP. These results suggest that AP is irrelevant and even disadvantageous to music. Systematic music training in early childhood seems effective for acquiring AP. Possible genetic contributions to AP are undeniable, but evidence for them is inconclusive. There are several AP-like phenomena that do not reach consciousness: absolute tonality, long-term memory of pitch of repeatedly heard tunes, specific patterns of pitch comparison in the tritone paradox, and fixed pitch levels in speech. Contrary to true AP observed as a pitch naming ability, the implicit AP phenomena are widespread among general population.