They generally use individual piezo-electric transducers one per string often in combination with small internal microphones to produce a direct output mixed electrical signal.

This involves the use of audio equipment such as microphones, recording devices and loudspeakers.

Although none of the major opera houses "... use traditional, Broadway-style sound reinforcement, in which most if not all singers are equipped with radio microphones mixed to a series of unsightly loudspeakers scattered throughout the theatre ", many use a sound reinforcement system for acoustic enhancement, and for subtle boosting of offstage voices, child singers, onstage dialogue, and sound effects ( e. g., church bells in Tosca or thunder effects in Wagnerian operas ).

The technology has had issues with usability, combining lenses with microphones with batteries with recording units ; all connected using spidery cables, which proved cumbersome in use when compared to the quality of the end content.

Since the crowd is often too loud for promos to be heard, naturally, wrestlers will use microphones, unless they are in the back.

While transformers are still used in the large majority of modern dynamic microphones, more recent condenser microphones are more likely to use electronic drive circuitry.

Recording and broadcast studios commonly use phantom powering as a means to provide power to microphones.

Professional wireless microphones use squelch to avoid reproducing noise when the receiver does not receive enough signal from the microphone.

Depending on the effect, recordists may use several DAT, hard disk, or Nagra recorders and a large number of microphones.

Theater productions use a number of techniques to capture, amplify, and recreate the sound of tapping, from using wireless microphones in the shoes of the dancers to the use of so called “ click tracks ” with synchronized, pre-recorded sound which is added during the performance.

A major component of the film is the mixing of the old and modern ; Chiron and Demetrius dress like modern rock stars, but the Andronici dress like Roman soldiers ; some characters use chariots, some use cars and motorcycles ; crossbows and swords are used alongside rifles and pistols ; tanks are seen driven by soldiers in ancient Roman garb ; bottled beer is seen alongside ancient bottles of wine ; microphones are used to address characters in ancient clothing.

An exception is made allowing the unlicensed use of low-power short-range transmitters in devices such as wireless microphones, cordless telephones, walkie-talkies, Wifi and Bluetooth, garage door openers, and baby monitors.

Most microphones today use electromagnetic induction ( dynamic microphone ), capacitance change ( condenser microphone ), piezoelectric generation, or light modulation to produce an electrical voltage signal from mechanical vibration.

Because of the need for greater volume and midrange clarity, drums were made almost entirely from maple until recently, when advances in live sound reinforcement and drum microphones have allowed the use of birch in high-volume situations.

Audio devices they use include " bugs " placed in strategic locations ( e. g., in " I Dream of Jeannie Cusamano " and " Mr. Ruggerio's Neighborhood ") and hidden microphones worn by operatives ( e. g., in " Rat Pack ") and informants ( e. g., in " Funhouse ", " Proshai, Livushka ", and " Members Only ").

The use of these microphones allowed players to issue commands to the game, controlling teammates ( as in SOCOM ) and other AI characters ( e. g., Pikachu ).

Although stage, lighting and other production aspects of opera houses often make use of the latest technology, traditional opera houses have not used sound reinforcement systems with microphones and speakers to amplify the singers, since trained opera singers are normally able to project their unamplified voices in the hall.

" The systems use "... an array of microphones connected to a computer is connected to an array of loudspeakers.

" Despite the uproar that has arisen amongst operagoers, Harada points out that none of the opera houses using acoustic enhancement systems "... use traditional, Broadway-style sound reinforcement, in which most if not all singers are equipped with radio microphones mixed to a series of unsightly loudspeakers scattered throughout the theatre.

Since contemporary musicians use different vocal techniques, microphones, and are not forced to fit into a specific vocal role, applying such terms as soprano, tenor, baritone, etc.

Although they are generally classified as a cappella metal, the band also includes a drummer, and use amplifiers on some songs to distort the voice to sound more like a real guitar.

One problem with some cable systems is the older amplifiers placed along the cable routes are unidirectional thus in order to allow for uploading of data the customer would need to use an analog telephone modem to provide for the upstream connection.

Specific examples are speech compression and transmission in digital mobile phones, room correction of sound in hi-fi and sound reinforcement applications, weather forecasting, economic forecasting, seismic data processing, analysis and control of industrial processes, medical imaging such as CAT scans and MRI, MP3 compression, computer graphics, image manipulation, hi-fi loudspeaker crossovers and equalization, and audio effects for use with electric guitar amplifiers.

Some players use the more nimble tips of the fingers to play fast-moving solo passages or to pluck lightly for quiet tunes. The use of amplification allows the player to have more control over the tone of the instrument, because amplifiers have equalization controls that allow the bassist to accentuate certain frequencies ( often the bass frequencies ) while de-accentuating some frequencies ( often the high frequencies, so that there is less finger noise ).

Some aficionados who prefer class-A amplifiers also prefer the use of thermionic valve ( or " tube ") designs instead of transistors, especially in Single-ended triode output configurations for several claimed reasons:

* Historically, valve amplifiers often used a class-A power amplifier simply because valves are large and expensive ; many class-A designs use only a single device.

These amplifiers use pulse width modulation, pulse density modulation ( sometimes referred to as pulse frequency modulation ) or a more advanced form of modulation such as Delta-sigma modulation ( for example, in the Analog Devices AD1990 class-D audio power amplifier ).

An early use of class-D amplifiers was high-power subwoofer amplifiers in cars.

His high volume and use of feedback required robust and powerful amplifiers.

Along with the Stratocaster, the Marshall stack and amplifiers were crucial in shaping his heavily overdriven sound, enabling him to master the use of feedback as a musical effect, and he created a " definitive vocabulary for rock guitar ".

With the widespread use of the original acronym as a common noun, actual optical amplifiers have come to be referred to as " laser amplifiers ", notwithstanding the apparent redundancy in that designation.

Of the two kinds of RF power amplifier, switching amplifiers ( Class D amplifiers ) cost less and use less battery power than linear amplifiers of the same output power.

Hence, the use of the operational amplifier is simplified because no external compensation is required for unity gain stability ; amplifiers without this internal compensation such as the 748 may require external compensation or closed-loop gains significantly higher than unity.

Digital instruments, which necessarily incorporate amplifiers, use the same principles as analog instruments for range resistors.

Parametric amplifiers use parametric amplfication.

Doped fiber amplifiers ( DFAs ) are optical amplifiers that use a doped optical fiber as a gain medium to amplify an optical signal.

Both of these bands can be amplified by EDFAs, but it is normal to use two different amplifiers, each optimized for one of the bands.

However, those regions have not seen any significant commercial use so far and so those amplifiers have not been the subject of as much development as the EDFA.

Steel-string guitars use different bracing systems from classical guitars, typically using X-bracing instead of fan bracing.

In this noble prayer are evinced profound religious feeling and exalted thought, as well as ability to use the Hebrew language in a natural, expressive, and classical manner ( Jerusalem Talmud Rosh Hashanah i. 57a ).

* Opioids ' classical use besides pain relief is as an anti-diarrhoeal drug.

Because less defensive emphasis was placed on the use of the forearms and more on the gloves, the classical forearms outwards, torso leaning back stance of the bare knuckle boxer was modified to a more modern stance in which the torso is tilted forward and the hands are held closer to the face.

Pope Pius XII introduced optional use of a new translation of the Psalms from the Hebrew to a more classical Latin.

In other words, it takes no more time to break RSA on a quantum computer ( up to a multiplicative constant ) than to use it legitimately on a classical computer.

Molecular mechanics simulations, for example, use a single classical expression for the energy of a compound, for instance the harmonic oscillator.

He spelled his own given name with a " C " in order to identify with the classical Western tradition ; writers who wrongly use " Karl " are seeking to emphasize his German identity.

The identification of libertarianism with neo-classical liberalism primarily occurs in the United States, where some conservatives and right-libertarians use the term classical liberalism to describe their belief in the primacy of economic freedom and minimal government.

The Egyptians, Persians and other civilizations mostly used columns for the practical purpose of holding up the roof inside a building, preferring outside walls to be decorated with reliefs or painting, but the Ancient Greeks, followed by the Romans, loved to use them on the outside as well, and the extensive use of columns on the interior and exterior of buildings is one of the most characteristic features of classical architecture, in buildings like the Parthenon.

Renaissance architecture was keen to revive the classical vocabulary and styles, and the informed use and variation of the classical orders remained fundamental to the training of architects throughout Baroque, Rococo and Neo-classical architecture.

What was added were rules for the use of the classical orders, and the exact proportions of the orders down to the most minute detail.

In the later 18th century the rules of the Renaissance and the Baroque periods came to be disregarded, and the original use of the orders revived, based on first-hand study of the ruins of classical antiquity-often hailed as the ' correct ' use of the orders.

Blount made one special contribution to the deist debate: " by utilizing his wide classical learning, Blount demonstrated how to use pagan writers, and pagan ideas, against Christianity.

Modern deists believe that they must continue what the classical deists started and continue to use modern human knowledge to come to understand God, which in turn is why a human-like God that can lead to numerous contradictions and inconsistencies is no longer believed in and has been replaced with a much more abstract conception.

In further cases of the use of the term, " the reference to the conceptual homeland – to the ' classical ' diasporas – has become more attenuated still, to the point of being lost altogether ".

In the late 1960s, Roy Wood — guitarist, vocalist and songwriter of The Move — had an idea to form a new band that would use violins, cellos, string basses, horns and woodwinds to give their music a classical sound, taking rock music in the direction " that The Beatles had left off ".

English Elizabethan and Stuart composers had often evolved their music from folk themes, the classical suite was based upon stylised folk-dances and Joseph Haydn's use of folk melodies is noted.

Dr Villanueva's response received worldwide attention and is still seen as a classical piece of argumentation favouring use of Free Software in Governments.

The frequentist interpretation is a philosophical approach to the definition and use of probabilities ; it is one of several, and, historically, the earliest to challenge the classical interpretation.