Where can Jiaozuo sell anti-noise headphones?

I think some large and medium-sized electrical appliances are sold, and the in-ear headphones with the best sound insulation effect are iron triangle ck5, koss sp and domestic rambler H260. In addition, if it is specialized in noise prevention, you can consider Philips' noise-reducing earphone HN060, which costs more than 200 yuan. It is currently the cheapest active noise-reducing earphone with the best sound insulation effect. In addition, only Sony's noise-reducing headphones are cheaper, which costs nearly a thousand yuan. Active noise reduction means that after the surrounding noise is monitored by the built-in microphone on the earphone, the noise reduction system generates reverse sound waves equal to the external noise to neutralize the noise. So as to eliminate external noise interference.