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HandsetSoundDesignTips関於手機音効設計YAMAHACORPORATIONDec.2003FactorsAffectingSoundQuality影響音響効果的要素zSpeaker-Mostimportant!楊声器的特性是最重要的zHousing-Nextimportant!音腔是其次重要的zContent-Veryimportant!曲目内容也非常重要zAmplifier–Volume!功放控制音量、尽量大、但不要破音Dec.２００３，CONFIDENTIALIdeaSpeakerFrequencyResponseCurve理想的頻率特性Middleband(200Hz-2KHz)isthemostimportant!120110100908070dBSPL6050403020234510101010HzDec.２００３，CONFIDENTIALGoodSpeakerExample好的楊声器例ActualexampleofSomeSpeakerCompanyGoodFrequencyResponseHighLevelOutput(around90dB)Dec.２００３，CONFIDENTIALBadSpeakerExample差的楊声器例SoundistoosmallProblem!120110100908070dBSPL6050403020234510101010HzDec.２００３，CONFIDENTIALCarePointsinHousingDesign音腔設計時的注意点zLeaveenoughbackspacetospeaker!給楊声器的後部留有足空間zMakesurenosoundleaking!前部要蜜封、不漏气zEnoughfrontopenarea,about1/3ofspeakerarea!音腔開口需要1/3左右Dec.２００３，CONFIDENTIALMAEmbeddedEQtoImproveSoundQualityMA内置EQ可帮助改善音質GainEnhancementatdesiredfrequencytoimprovesoundQualityDec.２００３，CONFIDENTIALOptimizingContents内容的最優化zToincreasevolumeofbassinstruments加大貝司等低音楽器的音量zTofinetunesoundonarealhandset用手機調試音色、確認効果zTobuycontentsfromYamaharecommendedcontentprovider採用Yamaha推薦的内容制作商制作的内容zTrashcontentscannevermakegoodsound!差的曲目内容只会發出噪音Dec.２００３，CONFIDENTIAL
