The 3.5 mm audio jack, also known as a 1/8-inch jack or mini-jack, is a standard audio connector used for transmitting analog audio signals. It has a diameter of 3.5 millimeters (approximately 1/8 inch), hence the name. This type of connector is commonly found in various audio devices, including:
- Headphones/Earphones: Many headphones and earphones use a 3.5 mm audio jack for connection to audio sources like smartphones, MP3 players, computers, and more.
- Speakers: Some portable speakers and audio systems use 3.5 mm jacks for connecting to devices like smartphones, tablets, and laptops.
- Smartphones and Tablets: Most smartphones and tablets have a 3.5 mm audio jack for connecting headphones or external speakers.
- Laptops and Computers: Many laptops and desktop computers have a 3.5 mm audio jack for connecting headphones, speakers, or external audio devices.
- Audio Equipment: Some audio equipment, such as amplifiers, receivers, and certain recording devices, may also feature 3.5 mm jacks.
The 3.5 mm audio jack is widely used due to its simplicity and universality, making it a standard for connecting audio peripherals. However, in recent years, some devices, particularly smartphones, have started omitting the 3.5 mm jack in favor of wireless audio or USB-C connections.