sensitivity — the degree to which a measuring instrument or receiver can detect weak signals or changes; also used for radio/TV reception.
ラジオの感度が悪くていつも雑音が入る。
The radio's sensitivity is poor, so there's always static.
このアンテナは感度が高く、遠くの局も受信できる。
This antenna has high sensitivity and can pick up distant stations.
受信感度を上げると微弱な信号も拾えるがノイズも増える。
Raising the reception sensitivity lets you catch weak signals but also increases noise.
sensitivity of film or sensor (e.g., ISO) — higher sensitivity allows easier shooting in low light but can increase noise.
暗い場所では感度の高いフィルムを使うと良い。
It's good to use high-sensitivity film in dark places.
スマホのカメラは高感度撮影が得意だ。
Smartphone cameras are good at high-sensitivity shooting.
感度を上げすぎると写真にノイズが目立つようになる。
If you increase sensitivity too much, noise becomes noticeable in photos.