Whois & Analysis for jabra.ru

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs).

Invented by telecom vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables.

Headphones (or head-phones in the early days of telephony and radio) are a pair of small listening devices that are designed to be worn on or around the head over a user's ears.

They are electroacoustic transducers, which convert an electrical signal to a corresponding sound in the user's ear.

Headphones are designed to allow a single user to listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air, for anyone nearby to hear.

Headphones are also known as earspeakers, earphones or, colloquially, cans.

Circumaural and supra-aural headphones use a band over the top of the head to hold the speakers in place.

The other type, known as earbuds or earphones consist of individual units that plug into the user's ear canal.

In the context of telecommunication, a headset is a combination of headphone and microphone.

Headphones connect to a signal source such as an audio amplifier, radio, CD player, portable media player, mobile phone, video game console, or electronic musical instrument, either directly using a cord, or using wireless technology such as bluetooth or FM radio.

The first headphones were developed in the late 1800s from telephone receivers for use by telephone operators, to keep their hands free.

Initially the audio quality was mediocre and a step forward was the invention of high fidelity headphones.

A headset combines a headphone with a microphone.

Headsets are made with either a single-earpiece (mono) or a double-earpiece (mono to both ears or stereo).

Headsets provide the equivalent functionality of a telephone handset but with hands-free operation.

They have many uses including in call centers and other telephone-intensive jobs and for anybody wishing to have both hands free during a telephone conversation.

Jabra is a subsidiary of GN Netcom.

It develops, manufactures and markets wireless and corded headsets for mobile phone users, contact centers and office-based users.

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).

An amplifier functions by taking power from a power supply and controlling the output to match the input signal shape but with a larger amplitude.

In this sense, an amplifier modulates the output of the power supply based upon the properties of the input signal.

An amplifier is effectively the opposite of an attenuator: while an amplifier provides gain, an attenuator provides loss.