Earphones, or headphones, work similarly to speakers in that they turn electrical energy into sound by using magnetism and the vibration of air. While a large speaker vibrates the air in the space around it to create sound, a pair of earphones only vibrates the air inside the ear canal. Earphones are usually designed as either closed-back or open-back, which affects how much sound can escape from them.Know More
A pair of closed-back earphones is sealed in the back to limit how much sound escapes when they are being used. Closed-back earphones also minimize the amount of sound that leaks to the outside, reducing sound pollution around the user.
Open-back earphones are open at the back, allowing some air and sound to escape. In some cases, open-back earphones have better sound quality, but it is at the cost of increased sound pollution. Open-back earphones also allow ambient noise to leak into the user's ear canal.
Smaller sizes of earphones can also be fitted with noise-cancelling, soft foam earpieces that completely cover the ear canal. This method of passive noise reduction eliminates any noise escaping from the earphones to the surrounding area while isolating the user from any ambient noise leaking in.Learn More
Change the bass on the Bose 321 Home Entertainment System using the Bass Compensation option in the Settings menu. According to Bose, the placement of the Acoustimass module affects how much bass you hear. Place the module close to a corner to increase the bass, or keep it far from corners to reduce the overall bass in the room.Full Answer >
MP3 is an audio file extension that stands for Moving Picture Experts Group (.mpeg) Audio Layer 3. MPEG is a file extension like .doc or .pdf.Full Answer >
A person can load music to their iPod Shuffle without transferring the files through iTunes by using a program called PodTrans. PodTrans also supports other model iPods, such as the iPod Touch, the iPod Nano and the iPod Classic.Full Answer >
To build a 12-inch subwoofer box you need three-quarter-inch medium-density fiberboard, 2-inch drywall screws and either half-inch or three-quarter-inch panhead sheet metal screws. Other materials and tools that are required include carpenter's glue, a jigsaw saw, an electric drill, silicon caulk, non-hardening rope caulk and a speaker terminal cup. Most importantly, a subwoofer of the appropriate size is also required.Full Answer >