Apparatus for transmitting, recording, reproducing or amplifying sound; digital audio players; audio amplifiers; audio speakers; audio transmitter units; audio loudspeaker systems; headsets for smartphones or mobile phones; headphones; earphones; earbuds; audio speakers; microphones; wireless communication apparatus, namely, earphones and headsets for use with smartphones; wireless communication devices for the transmission of multimedia content; apparatus for wireless transmission of acoustic information; wireless speakers; wireless earphones; wireless headphones; noise cancelling headphones; downloadable software for use in relation to headphones and other audio devices; downloadable application software for managing and controlling audio data and audio output for use with wireless devices; downloadable computer software for managing and controlling audio data and audio output for use with wireless communication apparatus; downloadable computer software applications for mobile phones, namely, software for use in relation to the control and settings of headphones and other audio devices; noise level indicators; wearable digital electronic communication device for voice, data or image transmission; wearable portable media players; wearable audio equipment, namely, digital audio players, audio speakers, headphones; speaker switches; cases for earphones; cases for headphones; cases for portable media players; portable charging cases for earphones and earbuds; parts and fittings for the aforesaid goods