scoring_breakdown:[{"source":"word_of_mouth","score":87.1,"weight":0.2,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"综合各平台评价,W820NB口碑极佳。优点:性价比极高,300元价位降噪效果超出预期;续航长达40小时,一周一充;佩戴轻便,不压头;音质均衡,适合流行音乐。缺点:降噪深度有限,无法完全过滤高频噪音;塑料感较强,质感一般;通话降噪效果一般;App功能较少。专业评测指出,其降噪性能接近索尼XM3的70%,但价格仅为1/10。用户满意度达92%,是百元降噪耳机中的销量冠军。","source_count":4}},{"source":"objective","score":90,"weight":0.5,"confidence":0.7,"details":{"dimension":"battery","rating_avg":4.5,"review_count":620000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":90,"weight":0.15,"confidence":1,"details":{"rating_avg":4.5,"review_count":620000,"source":"product_reviews_aggregate"}},{"source":"expert","score":80.80000000000001,"weight":0.15,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"matched_count":2,"base_score":82,"weighted_score":80,"sample":["数码博主@极客湾:'W820NB是300元价位最值得买的降噪耳机,没有之一。'","学生UP主@小鹿:'作为学生党,这款耳机让我在地铁上也能专心学习,强烈推荐。'"]}}]