Headphones

Earpiece headphone mostly used on MP3 players but also plugs into sound cards

R40

MK-610MV KASAKU 610MV Microphone Headset with Volume controller, ideal for office use over Skype or switchboards, light weight, affordable

R50

MK-720MV KASAKU 720MV Multi-Media Stereo Microphone Headset with Volume Controller

R160

MK-840MVI KASAKU 840MIV Bass Vibration Multi-Media Stereo with Volume Controller, typical cool gamer's set

R220

USB-800MV KASAKU USB-800MV USB Microphone Headset with Volume Controller - Perfect Simulate 5.1 Channel Surround, Compatible with USB2.0, Function without Computer Sound Card, Integrated microphone fuction, Personal Operation system. Serious stuff!

R440

Choosing headphones

Nathaniel Baldwin invented headphones in 1910. The first dynamic headphones, the DT 48, were produced in 1937. Quadrophonic headphones were developed in 1973.

Loudness is measured in decibells, named after Alexander Graham Bell. Bell also was a teacher of speech to the deaf (his mother and his wife was deaf). In 1879 he created an audiometer to detect hearing loss.