Application cases
Continuous load test of loudspeakers, speaker boxes, headphones, splitters, etc.
According to the test results, the rated input power of the tested product can be determined.
Inject noise into the loudspeaker to measure the sound pressure sensitivity (dB value) of the loudspeaker.
The frequency response curve of the loudspeaker can be measured by using the pink noise of the machine and the audio frequency spectrum analyzer.
Product details
Primary; To feature :& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;
This machine uses logic circuit to generate "Pseudo Random Noise", which is the most advanced method to generate audio white noise.
The general noise generator has almost only white noise and pink noise. If you want to use it to test the loudspeaker, you must add a Weighting Filter, a power amplifier and a True rms voltmeter. A total of four circuits can be used to test the loudspeaker. This machine is a four in one design. It has included all the four circuits listed above. In addition to generating white noise and pink noise, there are three kinds of Weighted Noise, which meet the national standards shown on the next page.
This machine can also use the internal noise source, connect other types of weighting filters required externally, and then test the horn after being amplified by the internal power amplifier, so this machine can be used for horn power test of other special purposes; If the national standard is revised, the machine can also easily change the national standard spectrum through the insertion of an external filter.
Primary& nbsp; To & nbsp;& nbsp; Use To:& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;
Continuous load test of loudspeakers, speaker boxes, headphones, splitters, etc.
According to the test results, the rated input power of the tested product can be determined.
Inject noise into the loudspeaker to measure the sound pressure sensitivity (dB value) of the loudspeaker.
The frequency response curve of the loudspeaker can be measured by using the pink noise of the machine and the audio frequency spectrum analyzer.
Model - 8121C Basic Specifications& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;& nbsp;
Noise Type :
White Noise:
-3dB Bandwidth : 20Hz~100 kHz
Roll off : -24dB / Oct.
Flatness : ± 1dB
Pink Noise:
-3dB Bandwidth : 20Hz~20 kHz
Roll off : -24dB / Oct.
Crest factor : 4 ( IEEE 219 )
Weighted Noise Ⅰ:
Complies IEEE 219, CNS 4785, JIS C5531.
& nbsp;& nbsp;& nbsp; 4. & nbsp; Weighted Noise Ⅱ:
Complies EIA 426B,
& nbsp;& nbsp;& nbsp;& nbsp; 5. & nbsp; Weighted Noise Ⅲ :
Complies DIN 45573.
Voltmeter :
True rms response with Hi / Lo two ranges:
Lo
Hi
100 W
0 ~ 6 V
0 ~ 30 V
Accuracy : < ± ( 1% rdg. + 1% F.S. )
Amplifier :
1. & nbsp; 100W output is defined at unclipped maximum output of sine wave.
2. & nbsp; Frequency response : 20 Hz ~ 20 kHz ± 0.2dB
& nbsp;& nbsp;& nbsp;& nbsp;& nbsp; 20 kHz ~ 100kHz ± 1dB
3. & nbsp; Output : With permanent short circuit protection. & nbsp;& nbsp; Load Impedance :≧ 3.2 Ω.
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