The cheapest to listen through walls is a long glass cup with a narrow bottom and wide top.
Stethoscope
A common output device for listening to music is a speaker or headphones, which convert digital audio into sound. #LifestyleBranding
Yes.
Ear
Listening to music from an ipod/mp3 device.
man you going through unknown tunnel
Listening devices (aka: 'bugs') are said to be vulnerable to the playing of sound or music from other sound producing devices (TV's - radio - players - etc) but I cannot assure that this is 100% correct.
An electronic listening device designed to be used in a briefcase or small bag.
To make Alexa go to sleep, you can say "Alexa, go to sleep," and it will enter a low-power mode. Alternatively, you can use the command "Alexa, turn off," or simply unplug the device. If you want to stop it from listening, you can also press the microphone button on the device to mute it.
when he appreciates listening to you make him a sandwich
The audio output of this device is stereo, providing sound through two channels for a more immersive listening experience.
It was Lewis Nixon who invented the very first sonar-type listening device in 1906.