You can buy electromagnetic radiation detectors, optical detectors, and other equipment for detecting hidden cameras and use them to check each room yourself. The cheapest ones, with a detection radius of only a few feet, start at $3; professional and more powerful ones are obviously more expensive.
Simply download a hidden camera detector app and scan the area for any devices. The app will create an alert if any are found. Using a flashlight to check for unusual reflections in objects is another easy way to find a hidden camera; the lens will reflect the light back, drawing attention to the hidden device.
Most wireless hidden cameras are connected to Wi-Fi so that they can be viewed remotely. You can check how many devices are connected to the router to find hidden cameras.
Most of the hidden cameras have night vision function to watch in a low-light or dark environment. To do that, hidden cameras usually equipped with red or green LED light.
1) Scan the Wi-Fi network for hidden cameras using Fing App
Connect to the Wi-Fi and give the network a scan. All the devices on the network will be revealed in Fing App automatically, including details about every device such as MAC addresses, vendors, and models.
Static, popping, or scratching sounds on your phone lines.
This is caused by the capacitive discharge which occurs when two conductors are connected together (such as a bug or wiretap on a phone line). This is also a sign that an amateur eavesdropper or poorly trained spy is playing with your phone lines.
If you decide to check for yourself, pay particular attention to the bathroom and bedroom, where compromising footage might be filmed, as well as smoke detectors and household appliances, common hiding spots. Also check paintings, clocks, flower pots, and even toys.
If you decide to check for yourself, pay particular attention to the bathroom and bedroom, where compromising footage might be filmed, as well as smoke detectors and household appliances, common hiding spots. Also check paintings, clocks, flower pots, and even toys.
Use RF detectors:
Get yourself a radio frequency detector and take it around the home to locate any recording devices. That's because the sensor makes a beeping sound whenever you point it at anything emitting radio frequencies.
Criminals can hide hidden bugs and wireless devices virtually anywhere in your home, including inside light switches or fixtures, electrical outlets, on your phone line, in your smoke detectors, or even inside an FM radio, all of which makes them extremely hard to spot with the naked eye.
Use a flashlight.
According to CNN, using your phone's flashlight may be one of the easiest ways to detect a hidden camera. All you need to do is flash the light against anything that looks abnormal including clocks and smoke detectors.
Almost all hidden security cameras have red or green LEDs. They use these LEDs to create enough light on the infrared spectrum so they can capture their surroundings. Low-light conditions will cause the LEDs to blink or shine.
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.
While not all hidden cameras produce obvious visible (or audible) signs of their presence, every camera has a lens that reflects light whether it's on or off. You should be able to spot a camera by doing a thorough scan of the room with a light source, looking for a glint of light as it reflects off the camera sensor.
Hidden Camera Blocking
Tape, spackle or caulk over any drill holes containing hidden listening devices. If you get lucky and find a wired power source for a hidden recording gadget, simply unplugging it may be enough to stop it from recording.
Just like every other citizen, private investigators are prohibited from wiretapping or monitoring phone conversations without consent from at least one of the individuals. This federal law is present in all states of the USA.
The major players in the investigative database & information broker world, still catering to private investigators and independent skip tracers, include (in no particular order) IRB Search, Accurint, Merlin Information, Tracers Info, IQ Data, MasterFiles, PublicData and several others.