Latest Volume/Issue

Volume And Issue List
Acoustical Science and Technology
- Vol.36(2015)
  - No.2 p.49-
  - No.1 p.1-
- Vol.35(2014)
- Vol.34(2013)
- Vol.33(2012)
- Vol.32(2011)
- Vol.31(2010)
- Vol.30(2009)
- Vol.29(2008)
- Vol.28(2007)
- Vol.27(2006)
- Vol.26(2005)
- Vol.25(2004)
- Vol.24(2003)
- Vol.23(2002)
- Vol.22(2001)
- Vol.21(2000)

Predecessor

Journal of the Acoustical Society of Japan (E)

Acoustical Science and Technology Vol. 36(2015) No. 2

INVITED REVIEW

Road traffic noise prediction model ``ASJ RTN-Model 2013'': Report of the Research Committee on Road Traffic Noise

Shinichi Sakamoto

Released: March 01, 2015

P49-108

Full Text PDF[6498K]

PAPERS

Prediction of insertion loss of detached houses against road traffic noise using a point sound source model

Kazutoshi Fujimoto, Kyosuke Tsuji, Toru Tominaga, Kengo Morita

Released: March 01, 2015

P109-119

In order to predict equivalent continuous A-weighted sound pressure level (L_Aeq) of road traffic noise in the area facing roads, a grasp of the insertion loss of buildings against road traffic noise is needed. In the previous study, the authors proposed F2006 for predicting the insertion loss of detached houses against road traffic noise using a line sound source model. However, in order to predict L_Aeq at residential areas facing a curved road, a prediction method based on a point sound source model is needed. Therefore, a new prediction method of the insertion loss of detached houses against road traffic noise is proposed in this paper. The validity of the proposed prediction formula is verified through additional experiments. This simple method is applicable to the evaluation of the Environmental Quality Standards for Noise in Japan.

Psychoacoustic examination of feasible level of additional warning sound for quiet vehicles

Katsuya Yamauchi, Daniel Menzel, Masayuki Takada, Koji Nagahata, Shin-ichro Iwamiya, Hugo Fastl

Released: March 01, 2015

P120-125

The reduced noise of electric and hybrid electric vehicles has been of particular concern because of the potential danger that these vehicles pose to pedestrians when their approach is inaudible against background noise. To address this issue, the use of additional warning sounds in such vehicles is being considered in various countries. The aim of this study was to examine the feasible level of the warning sounds in some urban environments. The levels of three candidate warning sounds (sound of car horn, engine sound, and band-pass noise) were adjusted by the study subjects against four types of urban background noise presented in a laboratory environment. The subjects were asked to adjust the level of the warning sounds so that they were reliably audible or just detectable. The results showed that the level of background noise and type of warning sound significantly affected the perception of the warning sounds, but there was no significant cross-cultural difference between the German and Japanese subject groups. The observations showed that a warning sound that was reliably audible in a particular environment might be inaudible in another environment approximately 10 to 20 dB noisier. The results were also compared with current recommended levels of warning sounds for quiet vehicles.

TECHNICAL REPORT

Improvement of energy-based calculation method for noise radiation from semi-underground road based on a field experiment

Shinichi Sakamoto, Toshio Matsumoto, Sakae Yokoyama, Osamu Funahashi

Released: March 01, 2015

P126-134

To determine noise radiation characteristics from a semi-underground road structure and to confirm the validity of a calculation method for road traffic noise, we previously carried out an in situ experiment using loudspeakers at a semi-underground road with reflective surfaces under construction. Thereafter, we carried out another experiment at the same experimental site, focusing on the effect of the pavement of an absorptive road surface and of setting absorptive louvers on the aperture part. In this report, experimental results on the effect of the pavement of an absorptive road surface are described. On the basis of the experimental results, the accuracy of a practical calculation method for noise around a semi-underground road, the hypothetical point source method, specified in the ASJ RTN-Model 2008, was discussed. Through the discussion, the practical calculation method was partially revised. That is, the effect of the absorption of the road surface was included in a correction term describing the sound power level of a hypothetical sound source that takes into consideration the multiple reflections between the ceiling and the road surface.

ACOUSTICAL LETTER

Relationship between frequency shifting of vehicle sounds and acceleration impression

Katsuya Yamauchi, Takayuki Shiizu, Fumio Tamura, Yuichiro Takeda

Released: March 01, 2015

P135-137

Full Text PDF[357K]

—Special Issue on Ultrasonics—

FOREWORD

Preface to the Special Issue on Ultrasonics

Kentaro Nakamura

Released: March 01, 2015

P138

Full Text PDF[24K]

PAPERS

100-MHz ultrasonic linear array transducers based on polyurea-film

Marie Nakazawa, Masaya Tabaru, Toshiki Takayasu, Takahiro Aoyagi, Kentaro Nakamura

Released: March 01, 2015

P139-148

Eight- and 32-element ultrasonic array transducers using polyurea films are fabricated and experimentally tested in this study. Aromatic polyurea thin films, prepared by vapor deposition polymerization, are suitable for use as an ultrasonic transducer. In this paper, we present two types of polyurea array transducer with 20 and 200 μm pitches. The polyurea films were prepared through vapor deposition polymerization, and miniature electrode arrays were fabricated by a lithographic technique. Resonance frequencies of approximately 30, 65, and 100 MHz were observed in the electrical admittance. To examine the performances of the prototype array transducers, a pulse/echo test and phased array experiment were performed. From the experimental results, we found that the polyurea array transducers fabricated by the proposed method correctly operated as expected.

Development of parallel thermoacoustic engine: Evaluations of onset temperature ratio and thermal efficiency

Yosuke Nakano, Shin-ichi Sakamoto, Aiko Kido, Yoshiaki Watanabe

Released: March 01, 2015

P149-154

For practical applications of a thermoacoustic system using factory exhaust heat or solar heat, it is necessary to decrease the onset temperature ratio. In a previous study, a cascade thermoacoustic system with a number of prime movers connected in series was examined. This system can be driven at a lower onset temperature ratio than a conventional thermoacoustic system with a single prime mover. However, there are some problems with this system: it cannot be driven continuously and its thermal efficiency is low. Therefore, a parallel thermoacoustic engine was proposed. In this study, we compared the onset temperature ratios and thermal efficiencies of three systems: a normal thermoacoustic engine with a single prime mover, a cascade thermoacoustic engine, and a parallel thermoacoustic engine with two prime movers. The results indicated the parallel thermoacoustic engine to be advantageous in terms of the onset temperature ratio and thermal efficiency.

ACOUSTICAL LETTERS

Pressure and pressure gradient of laser-induced emergent stress waves using 0.07-mm-thick black rubber target

Koji Aizawa, Yoshiaki Tokunaga

Released: March 01, 2015

P155-157

Full Text PDF[841K]

Accurate estimate of 2-dimensional motion vector via finite array synthetic aperture reconstruction processing of high-frame-rate speckle echo signal in living tissue

Motoki Katsuyama, Shin-ichi Yagi, Daiki Sugeno, Kiyoshi Tamura, Masakazu Sato

Released: March 01, 2015

P158-160

Full Text PDF[543K]

Estimation of velocity vector by target tracking

Takahiro Anjo, Naohiko Tanaka

Released: March 01, 2015

P161-163

Full Text PDF[280K]

Fundamental study of numerical simulation of ultrasound wave propagation in microcalcification for analysis of twinkling sign

Masayuki Tanabe, Lei Liu, Norio Tagawa, Masahiko Nishimoto

Released: March 01, 2015

P164-166

Full Text PDF[948K]

Effects of ultrasound irradiation on the growth of Japanese radish sprouts

Marie Tabaru, Ryusuke Fujino, Kentaro Nakamura

Released: March 01, 2015

P167-170

Full Text PDF[666K]

Measurement of ultrasonic transmission attenuation characteristics of canvas fabric

Kotaro Hoshiba, Shinnosuke Hirata, Hiroyuki Hachiya

Released: March 01, 2015

P171-174

Full Text PDF[735K]

Application of high-polymer adhesive tape to closed-crack detection using second-harmonic ultrasonic pulse waves

Makoto Fukuda, Takayuki Harada, Kazuhiko Imano

Released: March 01, 2015

P175-177

Full Text PDF[242K]

Three-dimensional analysis of temperature rise in soft tissue with bone near the focal area caused by focused ultrasonic radiation

Kazuma Shimizu, Kota Fukasawa, Takenobu Tsuchiya, Nobuyuki Endoh

Released: March 01, 2015

P178-181

Full Text PDF[1279K]

Analysis of mechanical and biological effects of ultrasonically activated devices

Bik Ee Lau, Tao Gao, Masashi Sekine, Tadashi Yamaguchi, Hideki Hayashi

Released: March 01, 2015

P182-185

Full Text PDF[716K]

Dispersion of the hypersound velocity in aqueous solutions of 4-methylpyridine in the vicinity of a special point concentration

Leonard Sabirov, Denis Semenov

Released: March 01, 2015

P186-187

Full Text PDF[64K]

1 - 18 / 18 Articles.

Top of this Page

System Maintenance

J-STAGE will undergo scheduled maintenance as follows.
Year 2015
Feb 21(Sat) 10:00 - Feb 22(Sun) 22:00(JST)
(Feb 21(Sat) 1:00 - Feb 22(Sun) 13:00(GMT))

Details

Announcement From J-STAGE

February 17, 2015
Please click here and answer the questionnaire to help us serve you better.

Back Issues

Volume And Issue List
Acoustical Science and Technology

Predecessor

Acoustical Science and Technology Vol. 36(2015) No. 2

INVITED REVIEW

Road traffic noise prediction model ``ASJ RTN-Model 2013'': Report of the Research Committee on Road Traffic Noise

PAPERS

Prediction of insertion loss of detached houses against road traffic noise using a point sound source model

Psychoacoustic examination of feasible level of additional warning sound for quiet vehicles

TECHNICAL REPORT

Improvement of energy-based calculation method for noise radiation from semi-underground road based on a field experiment

ACOUSTICAL LETTER

Relationship between frequency shifting of vehicle sounds and acceleration impression

—Special Issue on Ultrasonics—

FOREWORD

Preface to the Special Issue on Ultrasonics

PAPERS

100-MHz ultrasonic linear array transducers based on polyurea-film

Development of parallel thermoacoustic engine: Evaluations of onset temperature ratio and thermal efficiency

ACOUSTICAL LETTERS

Pressure and pressure gradient of laser-induced emergent stress waves using 0.07-mm-thick black rubber target

Accurate estimate of 2-dimensional motion vector via finite array synthetic aperture reconstruction processing of high-frame-rate speckle echo signal in living tissue

Estimation of velocity vector by target tracking

Fundamental study of numerical simulation of ultrasound wave propagation in microcalcification for analysis of twinkling sign

Effects of ultrasound irradiation on the growth of Japanese radish sprouts

Measurement of ultrasonic transmission attenuation characteristics of canvas fabric

Application of high-polymer adhesive tape to closed-crack detection using second-harmonic ultrasonic pulse waves

Three-dimensional analysis of temperature rise in soft tissue with bone near the focal area caused by focused ultrasonic radiation

Analysis of mechanical and biological effects of ultrasonically activated devices

Dispersion of the hypersound velocity in aqueous solutions of 4-methylpyridine in the vicinity of a special point concentration

System Maintenance

Announcement From J-STAGE

Journal Tools

Share this Title

Volume And Issue List Acoustical Science and Technology

Predecessor

Acoustical Science and Technology Vol. 36(2015) No. 2

INVITED REVIEW

PAPERS

TECHNICAL REPORT

ACOUSTICAL LETTER

—Special Issue on Ultrasonics—

FOREWORD

PAPERS

ACOUSTICAL LETTERS

System Maintenance

Announcement From J-STAGE

Journal Tools

Share this Title

Volume And Issue List
Acoustical Science and Technology