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Measurement of Speaker and Evaluation of Subjective Sound Quality

In the sound system, the speaker structure is the most simple, but the role is the most important. Speaker is the final part of the sound system, is the electrical signal into a key part Beats By Dre Cheap" href="/">Beats By Dre Cheap of the sound signal. As the structure of the speaker is not much, it led to any lack of impact on the entire replay effect. In the sound system, the speaker structure is the most simple, but the role is the most important. Speaker is the final part of the sound system, is the electrical signal into a key part of the sound signal. As the structure of the speaker is not much, it led to any lack of impact on the entire replay effect. The evaluation of the speaker, but also to subjective listening; the final music replay as a standard. Therefore, it also produced the following question: This is the speaker of the technical testing and subjective sound quality evaluation of the unity of the problem. HiFi experience with a certain friend, there will be such a consensus: This is the speaker's technical indicators and subjective audition there is a gap. Why is this? This will start from the current speaker test the main technical indicators. In the speaker of the technical indicators, the most important are the following: This is the frequency range, to withstand power, sensitivity and phase characteristics and transient characteristics. Frequency range, also known as frequency response, refers to the speaker from the bass to the treble of the replay range. At some point, a pair of small civilian speakers and a pair of large speakers monitor the range of frequency response may be consistent; but in the subjective listening feeling is very different. In the end, the speculation is wrong, but for another reason. The current frequency response test standard, still using years ago, 1 watt. In the years before the development of audio test standards, 1 watt 1 meter under the speaker frequency response curve, in many cases, on behalf of the full power of the test is close to the actual use of the situation. That era of speakers, basically belong to the small power, high sensitivity type. For the input test power of 1W, basically represents the actual working state of the low-power speaker. In recent years, with the development of speaker manufacturing technology, the vast majority of speakers have high power, low sensitivity. This makes the current frequency response test, from the actual use of the gap is growing. At present, most of the speakers (mainly refers to the home speakers), they are more than 50W of power, and beats by dre some even reached 200W. And the sensitivity, can only reach 82 ~ 86dB.

Large monitor speakers test indicators "quasi", in fact, this "quasi" word here does not mean correct, but refers to the test indicators and subjective listening closer. Since the front mentioned that the current 1 watt 1 meter test method there is a lack of, then within the scope of the current test standards, which speakers of the technical test and subjective listening results the closest? The answer is as follows: This is the large Monitor the speaker and the quality of the larger large-scale civilian speakers. Why is the result of a large speaker? There are three reasons. One of the large speakers of the box volume, so in the actual work of the low-frequency response by the volume of the box on the small constraints. The second is the large speakers to withstand the larger power, power margin is large, in the work beats earbuds to achieve Cheap Beats By Dre the possibility of overload distortion is relatively small. Especially the large monitor speakers, leaving the power margin is very large, there is no possibility of overload distortion. The third is the large speakers of the bass unit caliber relatively large, in the same bass, the unit's stroke is very small, the distortion is relatively small.