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I
Jan., 1930] NEW ASPECTS OF REVERBERATION 105
feedback is similar in its action to reverberation, having the tendency to prolong sounds, but the reverberation period corresponding to this would be very short. If a greater degree of overlapping and sound prolongation is found desirable, there are many expedients possible by which it can be supplied. For example, I was told that a certain British broadcasting station used the device of picking up the initial sound with a microphone, reproducing it in a separate reverberant chamber, picking it up there with a second microphone, and then broadcasting it.
I believe that I have gone far enough to indicate that the desirable effects of reverberation can all be simulated by a high grade electrical system and that these effects will be subject to complete control while some of the undesirable effects of reverberation can be eliminated. Prejudice against such electrical amplifying systems is inevitable, but if artists find that other people's voices sound' better with electrical reinforcement than in reverberant rooms and find that the public appreciates their own voices better, prejudice will quickly subside.
APPLICATION OF AMPLIFYING SYSTEMS TO ORCHESTRA MUSIC
In applying electrical reinforcement to orchestra music a favorable circumstance is that microphones can be located close to the individual players, the mixing being done in the electrical circuit. As I have said, feedback troubles are reduced whenever we can place the microphones close to the original source. In view of this favorable condition it should be possible to direct a certain amount of the reproduced sound toward the orchestra itself, in order that the musicians may get the desired sense of reinforcement and blending.
NEW MUSICAL EFFECTS
While it is not a part of the reverberation problem, I should like to mention another application of the electrical reinforcing system, which I believe may become an important factor. It contemplates the same equipment which I have already described, with possibly certain additional pickup arrangements. In the January, 1929, issue of Radio Engineering is an article on "New Musical Effects by Electrical Means."1 The article was inspired by some of my experiences with one of the first high powered loud speakers. Some of the selections most enjoyed by myself and others were vocal and
1 Reprinted September, 1929, by Projection Engineering.