It is ironic how this question is in the Literature and Language category.
Music from a piano
A television produces light and sound energy. The electrical energy from the power source is converted into these forms of energy to display images and produce sound for viewers to see and hear.
Documentorys are in the forms of books, movies, sound recordings, Radio programs etc.
A TV produces electrical energy to power its components and convert that energy into light and sound energy for viewing and listening.
You might observe the TV, and see what it produces... The main purpose of the TV is to produce light (the images on the screen) and sound. Like most energy-converting devices, it will also produce waste heat.
A TV also produces heat energy as a byproduct of its operation, as the electronic components generate heat while converting electrical energy into light and sound.
Vibrating produces sound.
Alarm clock: Converts electrical energy into sound energy to produce an alarm sound. Doorbell: Uses electrical energy to create a ringing sound when someone presses the button. Microwave: Generates a "ding" sound as an alert when the timer is up. Television: Produces sound using electrical energy to deliver audio from shows and movies. Radio: Converts electrical energy into sound waves to broadcast music and talk shows.
A harpsichord produces a sound by plucking a string when a key is pressed down.
When the TV is on the light and sound is coming out so when the two energies are active it produces heat.
TV always came with sound. There was never a "silent" TV. In fact by 1928 movies had sound.
The way in which the information is encoded is the difference between a digital and an analog television signal. Traditional television signals are prone to fading, ghost images, and static. A digital television signal produces a crystal-clear picture and sound without fading or interference.