A Study of Notebook Computer''s Noise Standard and Its Accreditation System

• Main Authors: Ho-Ping Cheng, 鄭和彬
• Other Authors: 蔡瑤昇
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/3e4pp6

碩士 === 國立臺北科技大學 === 工業工程與管理系EMBA班 === 96 === As the result of the truth that notebooks gradually replace desktops, and people pursuing better life quality, quality of notebooks is much vital. Noise is one supposed to be focused. To efficiently regulate notebook noise, a convincible and public conformity assessment as well as standards with criteria should be introduced. However, the existed standards are unable to perfectly point out all kind of noise, because while inspecting and researching noise, we find parameters used in criteria only can describe specific phenomena. For example, the standard stipulated by RAL German Institute, RAL-UZ 78 (Blue Angel, for system units and portable computers), is to measure noise by sound power test, but low energy emission still may cause annoying noise. Accordingly, for advanced noise evaluation, psychoacoustics is necessary. First, this study will make market survey by questionnaire to realize how consumers feel about their notebook noise emission, and consumers’ identification and requirement of conformity assessment. Second, referring to ISO7779, loudness in ISO532, and prominence ratio in ECMA74, criteria for notebook noise evaluation will be made based on jury test and statistics, which can be written in a new standard. Furthermore, a conformity assessment for notebook noise is designed and discussed, to make this new standard viable. Our research expects through this mechanism can create a more silent environment for notebook users.