如何规定扬声器系统的品质? - Klippel GmbH

谐波失真 THD @ SPL MAX
Harmonic Distortion for example THD @ SPL MAX
根据IEC60268-5 24.2部分的描述作微量修改来测量:
is measured by IEC 60268-5 section 24.2 with a
minor modification:
• 激励信号U校准到产生的输出SPL(f)>= SPLMAX
the stimulus U is adjusted to give an output SPL(f) ≥ SPLMAX for flower,l <
f < fupper,l SPL
flower f1
SPL MAX
harmonics
Sweeping tone f 1
如何规定扬声器系统的品质? How to Specify Sound Quality ?, 47
如何规定扬声器系统的品质? How to Specify Sound Quality ?, 48
f upper
互调失真 IMD @ SPL MAX
frequency
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Intermodulation Distortion IMD @ SPL MAX
根据IEC 60268-5 24.5部分描述作少量修改来测量:
is measured by IEC 60268-5 section 24.5 with a
minor modification:
激励信号U校准到声压级输出SPL(f)>=SPL(max)
the stimulus U is adjusted in such a way that the sound pressure
level of the fundamentals SPL(f) ≥ SPLMAX for flower,l < f < fupper,l Amplitude
f lower,l
f1
bass tone
harmonics
SPL MAX
difference tones summed tones
f2
voice tone
f upper,l
frequency
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