Dengarkan apakah ada dengungan pelan atau suara klik untuk mendeteksi alat rekaman. Selidiki detektor asap dan benda elektronik lain. Cari dekorasi yang terlihat aneh dan bukan pada tempatnya. Carilah kabel aneh yang tidak mengarah ke tempat apa pun. Buatlah detektor kamera tersembunyi untuk mencari perangkat yang disembunyikan. Perhatikan fiting lampu dan baterai di kendaraan. Periksa adanya cermin dua arah

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Hidden cameras are designed to be as discrete as possible, but many will still emit a slight sound when they are working. When the area of suspected surveillance is as quiet as possible, walk around slowly to listen out for any buzzing or slight clicking noises that might be coming from a hidden camera.  Try searching the room late at night to reduce the ambient sound in the room. This will make isolating and locating any noises much easier. There are plenty of different mechanical and electrica