如何规定扬声器系统的品质? - Klippel GmbH
如何规定扬声器系统的品质? - Klippel GmbH
如何规定扬声器系统的品质? - Klippel GmbH
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ϕ<br />
相對指向性特性<br />
Relative Directional Characteristics<br />
現存的可用標準 Existing standards can be used:<br />
AES 5id –1997 (1998),<br />
IEC 60268-5 Paragraphs 23.2, 23.3. 23.4<br />
<strong>如何规定扬声器系统的品质</strong>? How to Specify Sound Quality ?, 35<br />
ms<br />
10,0<br />
7,5<br />
5,0<br />
2,5<br />
0,0<br />
r o<br />
KLIPPEL<br />
<strong>如何规定扬声器系统的品质</strong>? How to Specify Sound Quality ?, 36<br />
φ<br />
• 發散角 Radiation angle<br />
• 定向指數 Directivity index<br />
• 象場角 Coverage angle<br />
可以應用於有源系統 can be applied to Active Systems<br />
dB - [V] (rms)<br />
10<br />
5<br />
0<br />
-5<br />
-10<br />
-15<br />
-20<br />
-25<br />
-30<br />
-35<br />
-40<br />
270<br />
300<br />
240<br />
330<br />
210<br />
0°<br />
Coverage angle<br />
180°<br />
1 kHz<br />
Sound Pressure Level (rel.)<br />
30°<br />
-15 -10 -5<br />
150°<br />
www.klippel.de<br />
傳遞函數的相關信息(小訊號模式<br />
傳遞函數的相關信息 小訊號模式)<br />
Group delay<br />
Hz<br />
10 2 10 3<br />
Relevant information of the Transfer Function H(f)<br />
(small signal domain)<br />
輸入訊號<br />
Input<br />
signal<br />
Digital<br />
audio<br />
input<br />
Equalizer<br />
DSP<br />
Control<br />
input<br />
相位響應 Phase response<br />
群延遲 Group delay<br />
Impulse accuracy<br />
const. time<br />
delay (latency)<br />
Gain<br />
Control<br />
Limiter<br />
X-over<br />
H(f)<br />
Tweeter<br />
protection<br />
Midrange<br />
protection<br />
Woofer<br />
protection<br />
amplifiers<br />
drivers<br />
1m<br />
50 100 200 500 1k 2k 5k 10k<br />
Frequency [Hz]<br />
x<br />
SPL<br />
Rel. Amplitude response<br />
smoothness of curve<br />
eff. frequency range<br />
(small signal )<br />
KLIPPEL<br />
www.klippel.de<br />
60°<br />
120°<br />
90°
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