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Tuesday, May 14, 2013
Pat Brown 05/14/13 04:06 PM,The procedure often followed for equalizing a loudspeaker is to place the measurement microphone on-axis and adjust for the flattest frequency response. This often involves boosting some filters when the axial response over a range of frequencies is lower than the average. Those that are opposed to the use of boost filters may choose to arrive at the same resultant response by reducing (cutting) parts of the response to the lowest common denominator. This results in the same electrical curve,… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Loudspeaker • Measurement • Processor • Sound Reinforcement -
Tuesday, May 07, 2013
Pat Brown 05/07/13 05:16 PM,It’s nearly impossible to mount a loudspeaker in a room without placing it near a room boundary. Some logical questions arise: 1. Does this affect the response? 2. Is the effect good or bad? 3. Can I use the boundary to my advantage? 4. Will treatment help? And, can room boundaries be a “tool of the trade”? Space-Loading Space-loading loudspeakers means that the otherwise spherical radiation is limited by a boundary or boundaries. Some common scenarios are shown in Figure… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Line Array • Loudspeaker • Measurement • Signal • Sound Reinforcement • Subwoofer -
Monday, April 08, 2013
PSW Staff 04/08/13 08:04 AM,The 4th edition of Sound System Engineering by Don Davis, Eugene Patronis, Jr., and Pat Brown, offers a unique opportunity to put three mentors on your bookshelf. What is shared in the 4th edition took the authors a collective 150 years of experience, study and research. Long considered one of the key books on the well-informed audio engineer’s shelf, Sound System Engineering provides an accurate, complete, and concise tool for all those involved in designing, implementing, and testing sound reinforcement… View this story
Filed in: Live Sound • Production • Church Sound • News • Business • Education • Installation • Sound Reinforcement • System -
Friday, April 05, 2013
Pat Brown 04/05/13 08:04 AM,For most humans, there is nothing easier than breathing, seeing, smelling and hearing. We do these things without thought, and even take them for granted. Our senses were given to us to help us exist in a physical universe. They are transducers that allow physical stimuli to be converted into a form recognized by the brain. We are bombarded with stimuli every waking moment, and our brains are continuously processing the information to help us function in our environment. Of… View this story
Filed in: Church Sound • Feature • Blog • Study Hall • Education • Installation • Measurement • Signal • Sound Reinforcement • System -
Wednesday, April 03, 2013
Pat Brown 04/03/13 11:36 AM,There are a number of possibilities for rating a power source. The most straightforward is a simple rating for continuous available power, a product of the maximum voltage (pressure) output times the maximum available current (flow) from the amplifier. This “Volt-Ampere” rating represents the largest number that could be used to characterize the amplifier. For the “ideal” amplifier, we could simply multiply the DC rail voltage times the maximum current available from the power supply into a purely resistive load.… View this story
Filed in: AV • Feature • Blog • Study Hall • Amplifier • AV • Power • Sound Reinforcement • System -
Friday, February 22, 2013
PSW Staff 02/22/13 10:59 AM,The Institute of Acoustics (IOA), the UK’s professional body for those working in acoustics, noise and vibration, has presented SynAudCon President Pat Brown with the 2012 Peter Barnett Memorial Award. The Peter Barnett Memorial Award, which is made annually, recognizes advancements and technical excellence in the fields of electro-acoustics, speech intelligibility, and education in acoustics & electro-acoustics. Institute of Acoustics, Sam Wise comments “Pat Brown’s contribution to electro-acoustics is measured by his gut level and study-enhanced understanding of audio and… View this story
Filed in: AV • Live Sound • Recording • Production • Church Sound • News • Production • Audio • AV • Business • Education • Manufacturer • Sound Reinforcement -
Friday, February 15, 2013
Pat Brown 02/15/13 07:22 PM,A small omnidirectional microphone element can be a versatile tool. Mics of this type are available from most of the major manufacturers. Their small size allows them to be placed very close to sound sources, even inside of instruments. The pickup pattern of a small mic element can be modified by the use of boundaries. When a sound wave encounters a boundary, there is a small region near the boundary where the incoming and reflected wave are effectively synchronous in… View this story
Filed in: Live Sound • Feature • Blog • Study Hall • Microphone • Sound Reinforcement • Stage -
Thursday, January 17, 2013
Pat Brown 01/17/13 10:27 AM,The human auditory system is equipped with two inputs - left and right ears. This “binaural” processing system provides us with the ability to localize where sound is coming from, something that a one-eared listener would have difficulty in doing. Playback systems may utilize any number of channels to surround the listener with sound, but two channels is always enough to simulate the human listener. Recording enthusiasts have long discovered the benefits of stereo microphones. While not necessarily “human-like,” they… View this story
Filed in: AV • Feature • Poll • Study Hall • Production • Audio • AV • Installation • Measurement • Signal • Sound Reinforcement • System • Technician -
Thursday, January 03, 2013
Pat Brown 01/03/13 07:40 PM,A common task in Audio Land is the need to feed a number of inputs from a single signal source. This may include driving a rack of amplifiers, providing feeds to the press, or distributing a signal around a building or campus. The methods used to accomplish this range from the profoundly simple to quite complex, and the appropriate method must be determined after sizing up the situation. Impedance matching means that an output is terminated with a “mirror” input… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Interconnect • Power • Signal • System -
Thursday, December 13, 2012
Pat Brown 12/13/12 07:35 PM,When most people think of sound reinforcement systems, or audio systems in general, they rarely do so with regard to speech intelligibility (SI). It’s usually about the music, with the assumption that if a system sounds good for music, it should work for speech. While this can be true in small, well-behaved rooms, it is seldom true in large spaces. My first sound system disaster was the design and installation of a large, expensive sound system that failed to produce… View this story
Filed in: AV • Feature • Blog • Study Hall • AV • Education • Measurement • Signal • Sound Reinforcement
Articles Tagged Pat Brown
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