Choralizer apparatus and method

DETAILED DESCRIPTION Referring to FIG.
1, a sound chamber 10 is shown as including four walls, a ceiling and floor, the length, width and height dimensions of the chamber preferably being dissimilar.
The walls, ceiling and floor may be considered to define sound reflecting surfaces or elements exposed to the chamber interior for reflecting sound in the chamber.
A sound source element may, for example, be defined by a loudspeaker 11 located in a corner of the chamber.
A sound detector element, as for example a microphone 12 is located to detect sound traveling in the chamber, whether that sound is transmitted directly from the loudspeaker or is reflected from one or more of the surface elements.
Furthermore, means is provided for effecting movement of at least one of the elements (i.
e.
detector element or source element) so as to vary detected sound frequency and quality, as previously described.
Such means in FIG.
1 takes the form of a rotary drive operatively connected with the sound detector element, i.
e.
microphone 12, the drive including an upright shaft 13 rotated about its axis as indicated by arrow 14, and a power unit 15 to rotate the shaft.
The shaft is angled at 16, and mounts a rotary drive unit 17 for an elongated rod 118, whereby the rod may also be rotated about an axis 119 angled from vertical.
The microphone 12 is carried at one end of the rod, and a counterweight 18 is carried at the opposite end of the rod 118.
Accordingly, a spiral path 19 is traced by the microphone in its rotary travel about the axis of shaft 13 and about the axis 119.
This combination effect can be controlled or varied by changing the angular velocity of the two rotations; thus, the choralizing effect described previously may be produced by simple apparatus and method.
In FIG.
2, the chamber 10 and loudspeaker 11 are the same as in FIG.
1.
Microphone 10 is in this case mounted on a pedestal 21 to remain in fixed, spaced relation to the loudspeaker.
A sound reflecting panel element, defined by upright panel or baffle 22, is moved cyclically within the chamber, as for example by a rotary drive, to effect production of the choralizing effect, as described in the introduction