【英文标准名称】:Specificationforreferencelevelsfornarrow-bandmaskingnoise
【原文标准名称】:窄频带掩蔽噪声的参考级规范
【标准号】:BS7113-1989
【标准状态】:作废
【国别】:英国
【发布日期】:1989-09-29
【实施或试行日期】:
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:频率;等响度级;频带宽度;音频;听力测定;声信号;音量;声强;数学计算;声学测量;校正;听力学;试验条件;听觉;可听度;听觉阈
【英文主题词】:audibility;bandwidths;equalloudnesslevel;acousticsignals;auditorythreshold;acousticmeasurement;audiology;audiofrequencies;testingconditions;audiometry;volume(sound);frequencies;calibration;hearing(auditoryperception);mathematicalcalculations;soundintensity
【摘要】:
【中国标准分类号】:M60
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语


Product Code:SAE J2934
Title:Laboratory Measurement of Tortuosity and Characteristic Lengths of Acoustical Materials
Issuing Committee:Acoustical Materials Committee
Scope: This SAE Recommended Practice describes a laboratory test procedure for measuring tortuosity , thermal and viscous characteristic lengths of acoustical materials for automotive and other ground transportation applications. The materials may consists of natural fibers, synthetic fibers or cellular foam materials. This method is based on measurement of acoustical quantities of the materials. Tortuosity , thermal and viscous characteristic lengths of the materials are then derived mathematically from the measured acoustical quantities.
Rationale: This SAE Recommended Practice describes a laboratory test procedure for measuring tortuosity , thermal and viscous characteristic lengths of acoustical materials for automotive and other ground transportation applications. The materials may consists of natural fibers, synthetic fibers or cellular foam materials. This method is based on measurement of acoustical quantities of the materials. Tortuosity , thermal and viscous characteristic lengths of the materials are then derived mathematically from the measured acoustical quantities.