The Journal of the INCE of Japan

Online ISSN : 1883-7506
Print ISSN : 0386-8761

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Volume 31, Issue 6

Displaying 1-8 of 8 articles from this issue

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Outline of Special Issue

Masaaki Hiroe, Michiaki Matsuda

2007 Volume 31 Issue 6 Pages 419-420
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.419

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Indicators for Environmental Noise

Hideki Tachibana

2007 Volume 31 Issue 6 Pages 421-425
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.421

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Relationship between Energy-based Descriptors and Effects on Sleep

Takayuki Kageyama

2007 Volume 31 Issue 6 Pages 426-430
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.426

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Relationships between L_{Aeq, T} and Annoyance

Jiro Kaku

2007 Volume 31 Issue 6 Pages 431-434
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.431

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Noise Indicators from the Viewpoint of Environmental Administration

Mitsugi Ishii

2007 Volume 31 Issue 6 Pages 435-438
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.435

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Evaluation Criteria for Noise at the Viewpoint of Consultative Administration

Hitoshi Kamoshida

2007 Volume 31 Issue 6 Pages 439-444
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.439

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The Technical Present Situation and Subject on an Unattended Aircraft Noise Monitoring System

Kenji Fukushima

2007 Volume 31 Issue 6 Pages 445-449
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.445

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Development of Sound Absorption Material of Nonwoven Polyester

Improvement of Sound Absorption Characteristics of Low and Middle Frequency Bands by Surface Vibration of Multi-layers Combined Using Hot Melt Film

Seiji Tamada, Kazuyoshi Iida, Teruhiko Maruyama

2007 Volume 31 Issue 6 Pages 450-457
Published: December 01, 2007
Released on J-STAGE: February 19, 2010

DOIhttps://doi.org/10.11372/souonseigyo1977.31.450

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Recently, nonwoven polyester absorption material, which is environment-friendly, good for working conditions, recyclable, and highly durable, has been widely used in the fields of railroad, automobiles, and other traffic systems. In this study, we first clarified the relationship between the airflow resistance of this material, which is an important design factor, and its sound absorption characteristics. Second, to obtain better sound absorption characteristics, we attempted surface vibration of multi-layers combined using hot melt film. As a result, we improved the sound absorption characteristics of the frequency band in industrial machines (500Hz-2kHz) by 20-30% without increasing the thickness of the absorption material.

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