Glossary of Terms

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Backdrop – a painted cloth hung at the back of a theater stage as part of the scenery.

DECT (Digital Enhanced Cordless Telecommunications) – is a radio technology for voice data applications (such as cordless telephones, wireless offices and even wireless telephone lines to the home)

Display – an electronic device for the visual presentation of data or images.

Flat Screen LCD (aka Liquid Crystal Display) – is a television display technology based on a liquid crystal display. LCD screens consume much less power than plasma displays because they work on the principle of blocking light rather than emitting it.

Flat Screen Plasma – is a type of flat panel display that uses small cells containing plasma; commonly used in larger televisions (30 inches (76 cm) and larger).

IP Address – enables one connected computer, or “smart” device to communicate with another connected device over the Internet. There are four different types of IP addresses: public, private, static and dynamic.

Internet Protocol (IP) – is the principal communications protocol in the Internet protocol suite for relaying data-grams across network boundaries. It also defines addressing methods that are used to label the datagram with source and destination information.

Lectern – a tall table which speakers stand at and use to leave their notes or laptop on.

Podium – a platform or stage which raises the speaker and lectern up from the floor level to be seen better by the audience.

Pod Tables – small and tall tables designed to be simple which are often used in events and conferences to provide support to users. Mostly used for event mingling to place drinks or snacks.

Recording – the action or process of creating a reproduction of a sound or a performance to be viewed at a later date.

Seating style – the layout in which a sitting audience will be arranged. This can be separated into 4 different types.

  • Boardroom Style – a rectangular layout with all chairs facing inwards, usually with a rectangular table or set of tables set up to form a large rectangle in the middle.
  • Classroom Style – a row of trestle (rectangular) tables in front of each row of chairs.
  • Round Table Style – a distribution of round tables around a room each of which will seat six to 10.
  • Theatre Style – rows of chairs set out with aisles at the side or at the center for access.

Signage – a commercial or public display sign.

Sound system – a set of equipment for the reproduction and amplification of sound.

Speaker – an apparatus that converts electrical impulses into sound, typically as part of a public address system. / A person who speaks.

Stage – a raised floor or platform, typically in a theatre, on which actors, entertainers, or speakers perform.

Technician – a person employed to look after technical equipment or do practical work in a laboratory.

Top Table – the table at which the chief guests are placed at a formal dinner.

Unified Communications (UC) – Solutions and Hardware integrates (or “unifies”) multiple communication methods within a business, e.g, phone calls, video conferencing, instant messaging, email, etc.

We supply a comprehensive range of Unified Communications (UC) Hardware including headsets, speakerphones, USB camera/microphone/loudspeaker Bar devices, video room systems and UC infrastructure. Regardless of which UC software you’re using, we’ll have a solution to fit the bill!

Universal Serial Bus (USB) – is an industry standard that establishes specifications for cables and connectors and protocols for connection, communication and power supply between computers, peripheral devices, e.g. keyboards, mice, printers, scanners, digital cameras, removable media drives and other computers.

  • USB 2.0 is a Universal Serial Bus (USB) standard. Almost all devices with USB capabilities, and nearly all USB cables, support at least USB 2.0. Devices that adhere to the USB 2.0 standard have the ability to transmit data at a maximum speed of 480 Mbps
  • USB 3.0 is the third major version of the Universal Serial Bus (USB) standard for interfacing computers and electronic devices. Among other improvements, USB 3.0 adds the new transfer rate referred to as SuperSpeed USB that can transfer data at up to 5 Gbit/s, which is about 10 times faster than the USB 2.0 standard.

VHS video (AKA Video Home System) – is a standard for consumer-level analog video recording on tape cassettes.

Video Conference (VC) – is a means to conduct a meeting or conference between two or more participants at different sites using computer networks to transmit audio and video data. The devices used can be a mobile phone, laptop, computer, wireless device or a room system.

Video Conferencing (VC) – is the technology which allows participants in different locations to hold face-to-face meetings without having to move to a single location together. Equipment and software is required to manage the connections. Depending on the software and equipment being used participants in a video conference call may share documents.

Voice over Internet Protocol (VoIP), also called IP Telephony is a category of hardware and software which enables people to use the Internet as the transmission medium for telephone calls by sending Voice data in packets, using IP, rather than traditional PSDN telephone circuits. Desktop, wireless, and conference phones can be used across IP, analogue, DECT and WiFi. Polycom telephony solutions can integrate with the Microsoft Lync Unified Communications solution.

Acoustic Terms:

Note: The human ear can detect a very wide range of pressure fluctuations, which are perceived as sound. In order to express these fluctuations in a manageable way, a logarithmic scale called the decibel or dB scale is used.

The decibel scale typically ranges from 0dB (the threshold of hearing) to over 120dB. An indication of the range of sound levels commonly found in the environment is given below.

dB (decibel) The scale on which sound pressure level is expressed. It is defined as 20 times the
logarithm of the ratio between the root-mean-square pressure of the sound field
and a reference pressure (2×10-5Pa).

dB(A) A-weighted decibel. This is a measure of the overall level of sound across the audible
spectrum with a frequency weighting (i.e. ‘A’ weighting) to compensate for the
varying sensitivity of the human ear to sound at different frequencies.

LAeq Defined as the notional steady sound level which, over a stated period of time, would
contain the same amount of acoustical energy as the A-weighted fluctuating
sound measured over that period.

L10& L90, if a non-steady noise is to be described it is necessary to know both its level and the degree of fluctuation. The Ln indices are used for this purpose, and the term refers to the level exceeded for n% of the time. Hence L10 is the level exceeded for 10% of the time and as such can be regarded as the ‘average maximum level’. Similarly, L90 is the ‘average minimum level’ and is often used to describe the background noise. It is common practice to use the L10 index when describing traffic noise.

LAmax (The maximum A) – weighted sound pressure level recorded over the period stated. LAmax is sometimes used in assessing environmental noise where occasional loud noises occur, which may have little effect on the overall Leq noise level but will still affect the noise environment.

LEP,d is the average A-weighted noise exposure level for a nominal 8-hour working day, also known as LEX,8h, used for
assessing the noise exposure of a worker during a working day.

LCpeak is the maximum value of the C-weighted, instantaneous
sound pressure

C-weighting is a standard frequency weighting for sound level meters, commonly used for higher level measurements and peaksound pressure levels.