Key Points in Loudspeaker Measurement Key Points in Loudspeaker Measurement Edited by Yang Dingjun TTE Shenzhen R&D Center yangdj@tcl.com dingjunyang@21cn.com 0755-33312210 Key Points in Loudspeaker Measurement 1. Main References Patrick Turnmire (ALMA Expert) Closing the Engineering Gap Between Asian Suppliers and Western Customers 2. Other References Weng Tailai: New Technology for Loudspeaker Measurement Weng Tailai: New Technology for Electroacoustic Measurement ALMA-related Materials Nanjing University State Key Laboratory of Modern Acoustics Shenzhen R&D Center www.nju520.com Key Points in Loudspeaker Measurement Why measure? Test environment Test system Microphone issues Acoustic performance measurement TS parameter measurement Power measurement Loudspeaker audition www.nju520.com Nanjing University State Key Laboratory of Modern Acoustics Shenzhen R&D Center Why measure? The basis of product standards, the agreement between supply and demand parties The need to improve products \"If you can\'t measure it, you can\'t improve it.\" Lord Kelvin First President of IEC (1906) How to design a good loudspeaker? PETER LARSEN answers: To make accurate measurements R&D personnel\'s basic skills Nanjing University Modern Acoustics State Key Laboratory Shenzhen R&D Center www.nju520.com Test environment Is an anechoic chamber necessary? Anechoic chambers have their place. They are impressive, have good isolation characteristics, are widely used in systems, and have unique advantages in distortion testing - but are they necessary? Anechoic chambers must eliminate sound, isolate vibrations, and soundproof Nanjing University Modern Acoustics State Key Laboratory Shenzhen R&D Center www.nju520.com Test environment Anechoic chambers Traditionally, B&K instruments were used to perform swept sine wave tests on loudspeakers to obtain accurate response tests. Testing based on groundbreaking computer systems coupled with door technology can be implemented in ordinary rooms. The question comes down to...
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