| Some time ago Laboratory XLAB for everyone popular science noise reduction headphones principle and its benefits, many small partners after reading the article are very interested, let us promote several products.  BOSE QC25E-commerce price Loading... We agreed that advertising this kind of thing is free, but I can use our black technology 3D head recorder to show you the strengths and shortcomings of noise-canceling headphones, feel in advance to feel active noise reduction. Previous review: "Black Technology really restore the noise reduction headphones buy do not buy to hear that" Test Equipment Introduction First introduce the protagonist - Bose QC25 active noise reduction headphones. Bose has been plowing in the field of noise for many years, its noise reduction products have a very good reputation. Although the QC25 is already a product of 2014, the noise reduction capability is not much different from that of the Bose QC35 newly released last year, so this simulation test is very valuable. Of course, there is a chance to get the latest product after that For everyone to do further testing. The Bose QC25 is a wired active noise canceling headset that requires one AAA (size 7) battery for noise reduction and approximately 35 hours of noise reduction. In addition, we used the 3DIO Head Recorder to record the sound of the QC25 and use the USB Dual Pre capture card from ART Pro Audio to capture the sound to a PC for further processing.
Sound acquisition steps Because the acquisition equipment is very poorly portable, so we had to use 2.1 speakers to simulate different environmental noises.On the limited noise material, we chose two representative noise environment: construction site construction noise and train compartment noise, The former represents an extremely noisy environment, while the latter is a relatively noisy transport during driving. Then, we recorded 5 pieces of sound for two scenes separately for comparison: 1 noise original sound (human head recorder direct recording) 2 noise recording after wearing QC25 without noise reduction 3 wear QC25 and turn on Active noise reduction after the noise recording, 4, in the noisy environment to listen to music experience (not open noise reduction), 5, in the noise environment, open active noise reduction to listen to music. Recording comparison show Reminder: Please try to keep the environment quiet before the video, or some details may not be heard after noise reduction. By comparing a total of 10 recordings in two noise scenarios, we found that QC25's low-frequency noise reduction effect is very good. The low-frequency noise in the environment is removed very cleanly in both the construction site under construction and the moving train compartment. That kind of booming feeling. However, QC25 short board is also very obvious, some of the high-frequency noise and can not be eliminated, the site of the drill noise in the noise, as well as the train driving 'eat, eat' sound is still more obvious. In fact, the elimination of the active noise reduction technology is the short board, and QC25 sound insulation is not strong, so really can not get high-frequency noise no way. As for the performance of the music, QC25 with noise reduction turned on was more impressive than the one with no noise reduction turned on, the sound was more frontier and the sound was clearer, and without the influence of low frequency noise, the music seemed to be clear in a flash 'A lot, in noisy environments can also use the normal volume to listen to the music.QC25 is the benchmark in the noise-canceling headphones, follow-up of the QC35 in the high-frequency noise reduction has improved better. Bose QC25 Comments: ○ low frequency noise reduction ability × high-frequency noise reduction ability in general ○ wear comfortable Through this sound experiment, I believe we can have a preliminary understanding of the noise reduction effect of active noise-canceling headphones.Not noise reduction headphones are still not perfect today, but can really in the bus, subway, aircraft and other scenarios Under the noise level to play a good, but for the site of this more extreme noisy environment, the active noise reduction technology is still not perfect noise reduction. Follow-up we will use 3DIO head recorder for more audio products, including mobile phones, laptops Extroverted and other products for intuitive comparison, interested friends may wish to pay attention to our later reports. Concerned about the WeChat public number: Truth laboratory XLAB, for more product-related experiments. |
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