Acoustics Factors to be Considered In Acoustical Design Acoustic Isolation no volume leak Anechoic chamber Frequency Balance with maintained level of intensities and quality of sound Acoustic Separation no unduly pick up of sound nearby Instrument Reverberation the sonic reflections can be controlled Cost of Factors apply the acoustic principles in cost effective way Dead and Live Acoustic Room Dead Room Anechoic Chamber Rooms that have very little or no echo/reverberation of their own.

A special structure built in a way that it produces no echoes. The sound of thee room that is completely dead is very unnatural sounding. Live Room Bounce sound around in a way pleasing to the ear Carnegie Hall Is so famous is the way it bounces around and scatters sound. Other examples are auditorium, bathroom and hall way. Acoustic Treatments Absorbers In porous materials the sound propagates in a network of small interconnected pores used to sound proof rooms and ducts as well as to treat reverberation problems in room.

Diaphragmatic Absorbers A box of panel that has a face that Is designed to vibrate or move with the sound pressure that Is exerted upon It. It works when sound pressure energy, especially rower frequency energy strikes the front wall of the absorber. Hellholes Absorbers Its make-up consist of a rigid cavity communicating with the external medium through a part. Used to suppress room and cabinet resonance and as a bass reflex tube to achieve a lower resonance compared with the cabinet resonance.

Adjustable Acoustics Adjustable Panels Allows you to use It In corners where the left and right sides of bass traps should touch two adjoining walls and help further reduce room resonance. Creates intimate recording environment in any room. Partitions and Portable Baffles A partition that prevents interference between sound waves in loud speaker used in reduction of echo to produce more favorable room acoustic Louvers A window blind or shutter with horizontal slats that are angled to admit light and air, equipment noise transmitted through buildings openings or from openings in acoustic enclosures,.

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Gobos a slang term used by sound recording engineer to refer to a movable acoustic isolation panel used to control the acoustical properties of a room by absorbing and diffusing sound waves Diffuser Absorb solves problems by using two absorption mechanism in addition to diffusion absorption extends to lower frequencies than flat porous absorbers Uniforms become a classic shape in architectural acoustic designed to provide a more uniform sound field through mid and high frequency diffusion.

Sound Reinforcing System Microphone electric traducer or sensor that converts sound into an electrical signal Loudspeaker electrostatic traducer that produces sound in response to an electrical audio signal input Electronic Controls Amplifier is an electronic device that increases the power of the signal modulates the output of the power supply Crossover Network an electronic network in loudspeaker system operates the signal into two or more frequency bands Mixers used for adding or multiplying signal voltages used to shift the frequency spectrum of a signal Equalizer essential in improving quality of sound help to tweak the tone of instrument Factors that are Important to Consider when Selecting each Component of the Sound Reinforcing System Microphone How they work sound information exist as patterns of air pressure; the microphone changes this information into patterns of electric current the two most commonly encountered in recording studios are the magneto dynamic and the variable condenser design TypicaL Placement single microphone use – having chosen with appropriate sensitivity and pattern stereo – an illusion of spacious produced by playing recording back through speakers Specifications The most important factor in choosing a microphone is how it sounds in the required application.

The following issues must be considered: sensitivity overload characteristic frequency response noise Pick-up Patterns These are polar graphs of the output produce vs.. The angle of the sound source. The output is repeated by the radius of the curve at the incident angle. Omni Bi-directional cardioids Tighter patterns Electronic Controls It is important that you do not select an amplifier with a higher frequency range than you need. Consider the power level. Consider the class operation. Driver Excursion Capabilities Woofer breaking and pick-up Woofer Off-Axis Response Consider your material characteristic. Consider your process conditions and requirements. Consider the mixer’s cleaning requirement. Consider your required mixture quality. Consider how to control temperature rise in the mixer.

Consider the mixers operating cost. Loud Speaker Sound Quality is a Personal Decision Sound quality is a very personal Judgment, like cars, food or wine. Everyone’s tastes are different. There is no “best” speaker, only the one that is best for you. Types of Speakers here are many types of speakers: fluoridating, bookshelf, satellite, in-wall and on- wall models. Your choice should be based on personal preference. Correctly Matching Speakers with Components A speaker should be matched with an amplifier or receiver with the right amount of power for the best performance. Manufacturers usually specify a range of amplifier power necessary to properly power the speaker.

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