Apple AirPods 4 アクティブノイズ キャンセリング搭載、ワイヤレスイヤホン、Bluetooth 5.3、ライブ翻訳、適応型オーディオ、外部音取り込みモード、パーソナライズされた空間オーディオ、USB-C充電ケース、ワイヤレス充電、H2チップ、防塵性能と耐汗耐水性能、「探す」対応、Qi充電

The AirPods 4 with Active Noise Cancellation (ANC) addresses a specific pain point for many users: the desire for noise reduction without the uncomfortable pressure of silicone ear tips (canal-type). By leveraging the H2 chip in an open-ear design, Apple has managed to bring a level of silence to a form factor that traditionally struggled with isolation. According to test data, the AirPods 4 can reduce train noise by approximately 19.7dB, a performance level comparable to the original AirPods Pro. User feedback reflects this, with many praising its ability to 'shut out' a significant amount of ambient noise. However, the limitations of the open design are evident; some users note that high-frequency sounds and certain sharp noises are not as effectively canceled as they are in the Pro models. Beyond noise cancellation, the 'Adaptive Audio' and 'Conversation Awareness' features seamlessly blend ANC and Transparency modes, allowing users to interact with their environment without removing the buds. The inclusion of an IP54 rating for dust and water resistance, combined with one of the smallest charging cases in the industry, makes these highly practical for daily commutes and light workouts. While the battery life is modest—up to 4 hours with ANC enabled (20 hours total with the case)—it is sufficient for most users who charge their devices nightly. This product represents a balanced middle ground for those who prioritize ear comfort over absolute silence.