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Isolation Cabinet (guitar)
A guitar speaker isolation cabinet is a sound-proof enclosure that surrounds the speaker and sound-capturing microphone and prevents sound leakage into the outside environment, enabling the guitar amplifier to be turned up without excessive listening volume. An amplifier and speaker at full volume can be extremely loud, posing a Noise health effects, risk to hearing and an annoyance to neighbors, and will often drown out other instruments in a Audio mixing, mix in live shows. In a recording studio, the sound of an amplifier at full volume may Spill (audio), spill into the microphones for other instrumentalists. The characteristic sound of a Vacuum tube, tube guitar amplifier as heard on the majority of professional recordings is achieved by playing the amplifier at high volumes and using one or more microphones to capture the sound. Turning the volume up causes the pre-amplifier to clipping (audio), overdrive and it drives the power amplifier into distortion and the loudspeaker to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microphone
A microphone, colloquially called a mic (), or mike, is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, and radio and television broadcasting. They are also used in computers and other electronic devices, such as mobile phones, for recording sounds, speech recognition, Voice over IP, VoIP, and other purposes, such as Ultrasonic transducer, ultrasonic sensors or knock sensors. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field; the condenser microphone, which uses the vibrating Diaphragm (acoustics), diaphragm as a capacitor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Room
A control room or operations room is a central space where a large physical facility or physically dispersed service can be monitored and controlled. It is often part of a larger command center. Overview A control room's purpose is production control, and serves as a central space where a large physical facility or physically dispersed service can be monitored and controlled. Central control rooms came into general use in factories during the 1920s. Control rooms for vital facilities are typically tightly secured and inaccessible to the general public. Multiple electronic displays and control panel (engineering), control panels are usually present, and there may also be a large display wall, wall-sized display area visible from all locations within the space. Some control rooms are themselves under continuous video surveillance and recording, for security and personnel accountability purposes. Many control rooms are occupied on a "24/7/365" basis, and may have multiple p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Guitars
Electric Guitars were an English band formed early in 1980 by Neil Davenport (vocals, lyrics) and Richard Hall (bass, vocals) who were both studying English at Bristol University. The band soon increased to a five-man line-up, with Andy Sanders (guitar, vocals), Matt Salt (drums) and Dick Truscott (keyboards), they also later added two backing singers: Sarah and Wendy Patridge. Their first single "Health" / "Continental Shelf" was released on local label Fried Egg Records in 1980. They contributed four live tracks to the first edition of '' The Bristol Recorder'' in 1980, and in 1981 released their second single "Work" / "Don’t Wake the Baby" on Recreational Records, which reached No. 45 on the UK Indie Chart. They toured as support to The Thompson Twins, which brought them to the attention of Stiff Records, who promptly signed them up. The band's first single for Stiff was "Language Problems" in 1982, and this was followed by an EP in the same year, from which Toni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound Baffle
A sound baffle is a construction or device which reduces the strength (level) of airborne sound. Sound baffles are a fundamental tool of noise mitigation, the practice of minimizing noise pollution or reverberation. An important type of sound baffle is the noise barrier constructed along highways to reduce sound levels in the vicinity of properties. Sound baffles are also applied to walls and ceilings in building interiors to absorb sound energy and thus lessen reverberation. Highway noise barriers The technology for accurate prediction of the effects of noise barrier design using a computer model to analyze roadway noise has been available since the early 1970s. The earliest published scientific design of a noise barrier may have occurred in Santa Clara County, California in 1970 for a section of the Foothill Expressway in Los Altos, California. The county used a computer model to predict the effects of sound propagation from roadways, with variables consisting of vehicle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soundproofing
Soundproofing is any means of impeding sound propagation. There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for Absorption (acoustics), absorption, or using active anti-noise sound generators. Acoustic quieting and noise control can be used to limit unwanted noise. Soundproofing can reduce the transmission of unwanted direct sound waves from the source to an involuntary listener through the use of distance and intervening objects in the sound path (see sound transmission class and sound reduction index). Soundproofing can suppress unwanted indirect sound waves such as Reflection (physics), reflections that cause Echo (phenomenon), echoes and resonances that cause reverberation. Techniques Absorption Sound-absorbing material controls reverberant sound pressure levels within a cavity, enclosure o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DI Unit
A DI unit (direct input or direct inject) is an electronic device typically used in recording studios and in sound reinforcement systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input, usually via an XLR connector and XLR cable. DIs are frequently used to connect an electric guitar or electric bass to a mixing console's microphone input jack. Its signal comes "direct" from the source instrument without passing through the air as sound waves, and thus is isolated from other sounds and avoids effects of microphone or room acoustics. The DI performs level matching, balancing, and either active buffering or passive impedance matching or impedance bridging. DI units are typically metal boxes with input and output jacks and, for more expensive units, “ground lift” and attenuator switches. DI boxes are extensively used with professional and semi-professional PA systems, professional sound reinforcement systems a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Attenuator (guitar)
A power attenuator, used with a guitar amplifier, is a type of attenuator that diverts and dissipates a portion of the amplifier's power to enable hearing the amplifiers high-volume characteristics at lower volume. Explanation Musicians playing through vacuum tube guitar amplifiers sometimes want to produce distortion by overdriving the amplifier's output stage. Under such a condition, the amplifier is close to or at its maximum output power. The resulting volume level is unsuitable for many playing conditions. By reducing the power to the speaker, a power attenuator reduces the volume without altering the overdriven quality of the tone. The most common approach to power attenuation is a ''power soaker'', which absorbs a portion of the power and dissipates it as heat. This device connects between the amplifier output and the guitar speaker. A typical attenuator circuit is the L pad. A variable L pad is a power divider circuit that provides an adjustable power level to a speake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound Reinforcement System
A sound reinforcement system is the combination of microphones, signal processors, amplifiers, and loudspeakers in Loudspeaker enclosure, enclosures all controlled by a mixing console that makes live or pre-recorded sounds louder and may also distribute those sounds to a larger or more distant audience. In many situations, a sound reinforcement system is also used to enhance or alter the sound of the sources on the stage, typically by using effects unit, electronic effects, such as reverb, as opposed to simply amplifying the sources unaltered. A sound reinforcement system for a rock concert in a stadium may be very complex, including hundreds of microphones, complex live sound mixing and signal processing systems, tens of thousands of watts of Audio power amplifier, amplifier power, and multiple Line array, loudspeaker arrays, all overseen by a team of audio engineers and technicians. On the other hand, a sound reinforcement system can be as simple as a small public address (P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reverberation
In acoustics, reverberation (commonly shortened to reverb) is a persistence of sound after it is produced. It is often created when a sound is reflection (physics), reflected on surfaces, causing multiple reflections that build up and then decay as the sound is absorbed by the surfaces of objects in the space – which could include furniture, people, and air. This is most noticeable when the sound source stops but the reflections continue, their amplitude decreasing, until zero is reached. Reverberation is frequency dependent: the length of the decay, or reverberation time, receives special consideration in the architectural design of spaces which need to have specific reverberation times to achieve optimum performance for their intended activity. In comparison to a distinct echo, that is detectable at a minimum of 50 to 100 millisecond, ms after the previous sound, reverberation is the occurrence of reflections that arrive in a sequence of less than approximately 50 ms. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equalization (audio)
Equalization, or simply EQ, in sound recording and reproduction is the process of adjusting the volume of different frequency bands within an audio signal. The circuit or equipment used to achieve this is called an equalizer. Most hi-fi equipment uses relatively simple Electronic filter, filters to make Bass (sound), bass and Treble (sound), treble adjustments. Graphic and parametric equalizers have much more flexibility in tailoring the frequency content of an audio signal. Broadcast and recording studios use sophisticated equalizers capable of much more detailed adjustments, such as eliminating unwanted sounds or making certain instruments or voices more prominent. Because of this ability, they can be aptly described as "frequency-specific volume knobs." Equalizers are used in recording studio, recording and radio studios, production control rooms, and live sound reinforcement and in instrument amplifiers, such as guitar amplifiers, to correct or adjust the response of m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Response
In signal processing and electronics, the frequency response of a system is the quantitative measure of the magnitude and Phase (waves), phase of the output as a function of input frequency. The frequency response is widely used in the design and analysis of systems, such as audio system, audio and control systems, where they simplify mathematical analysis by converting governing differential equations into algebraic equations. In an audio system, it may be used to minimize audible distortion by designing components (such as microphones, Audio power amplifier, amplifiers and loudspeakers) so that the overall response is as flat (uniform) as possible across the system's Bandwidth (signal processing), bandwidth. In control systems, such as a vehicle's cruise control, it may be used to assess system Stability theory, stability, often through the use of Bode plots. Systems with a specific frequency response can be designed using analog filter, analog and digital filters. The frequency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Listener Fatigue
Listener fatigue (also known as listening fatigue or ear fatigue) is a phenomenon that occurs after prolonged exposure to an auditory stimulus. Symptoms include tiredness, discomfort, pain, and loss of sensitivity. Listener fatigue is not a clinically recognized state, but is a term used by many professionals. The cause for listener fatigue is still not yet fully understood it is thought to be an extension of the quantifiable psychological perception of sound. Common groups at risk of becoming victim to this phenomenon include avid listeners of music and others who listen or work with loud noise on a constant basis, such as musicians, construction workers and military personnel. Causes The exact causes of listener fatigue and the associated pathways and mechanisms are still being studied; some of the popular theories are presented below. Introduction of artifacts in audio material Musicality, especially on the radio, contains musical aspects (timbre, emotional impact, melody) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
