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This 1 page Class Notes was uploaded by Reggie Rodriguez on Monday September 21, 2015. The Class Notes belongs to DRAM 2620 at University of Virginia taught by Michael Rasbury in Fall. Since its upload, it has received 31 views. For similar materials see /class/209567/dram-2620-university-of-virginia in Drama at University of Virginia.
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Date Created: 09/21/15
Audio Spotlight Sound System Research Report Michael Rasbury Assistant Professor Department of Drama Culbreth 208B semester rather than general ones First I must thank Arts and Sciences and the Vice President for Research and Graduate Studies funding this area of research Upon receiving the letter stating the funding 1 immediately ordered the device However it took longer than expected to arrive I did not have the pleasure of working with the system until my return to the University at the beginning of the fall As part of my original proposal I was searching for a way to send sound to specific areas Conventional speakers are for typically designed for maximum dispersion of sound in order to cover large areas The Audio Spotlight is a new type of transducer speaker capable of delivering sound to what it is pointed at see figure 1 utilizes the air as the speaker My first trial with the instrument was surprising I had never heard sound delivered in this way While holding the transducer and pointing it toward a distant wall the reflection of the sound from the wall was louder than the source of the sound With conventional speakers the wide dispersion angle causes the listener to hear more of the original source than re ections off of distant objects After this discovery I began pointing it at different surfaces in order to hear the results As suspected softer surfaces provided little to no reflection and hard ones such as cinder blocks and metal provided a distinct re ection For theatrical productions l have determined the Audio Spotlight to be useful in at least two ways One use would be to re ect sound off of hard objects on the stage towards the audience For instance when a real sound emitting object such as a radio is required on stage by the script rather than rigging the radio for sound the Audio Spotlight could be aimed at the front of the radio Using the radio as a reflective surface the sound would be projected at the audience providing the The transducer itself does not vibrate but rather Figure 7Audio otlight Manua Pageil perception that the item on stage is making the sound This practice would be more successful in our smaller Helms theatre I will define why later in this report A second use would be to point the Audio Spotlight directly at audience members for special effect The transducer panel could be swept across the audience so that two or three listeners perceive the sound at a given time I am now ready to test these potential
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