4,924,741

43.75.Tv ELECTRONIC DRUM WITH CURVED PLAYING SURFACE

Mark Vollenweider, Bridgeport, CT 15 May 1990 (Class 84/730); filed 22 July 1988

Electronic drums require one or more playing surfaces that arc struck by drumsticks to excite electronic percussion tone generating circuits. In this patent the surfaces 10 to bc struck are cylindrical. Each is equipped with a piezoelectric transducer 14 for generating the control signal. Each tubular

member is coupled to the next one by vibration isolator 50. The whole tubular assembly is similarly isolated from support tube 26. The percussion- ist strikes different sections of the assembly to actuate different percussion tone generators.--DWM

4,962,688

43.75.Tv MUSICAL TONE GENERATION CONTROL APPARATUS

Hideo Suzuki and Masao Sakama, assignors to Yamaha Corporation 16 October 1990 (Class 84/600); filed in Japan 18 May 1988

The musical control apparatus is a holding device having a shape that can easily be held by a person's hand. It includes pressure sensors that can be touched and depressed by each finger of the hand. An angle detector is also

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provided to detect a bending angle at the elbow. A combination of these sensor outputs is used to control (through a belt-worn computer system) key-on timing, frequency, tone spectrum or other tonal attributes.--DWM

4,939,969

43.75.Tv ACOUSTIC KEYBOARD MUSICAL INSTRUMENT

Hanzo Taguchi et aL, assignors to Nippon Gakki 10 July 1990 (Class 84/719); filed in Japan 6 February 1986

The playing keys of a piano arc used both to operate the piano action and to key remote control circuitry for an external electronic musical tone generating unit. The switches for controlling other characteristics of the remote electronic system arc mounted in the fallboard of the piano. This positions the controls conveniently just above the keyboard during use, and conceals the controls along with the keyboard when the fallboard is hinged forward to cover the keys.--DWM

4,964,837

43.75.Tv RADIO CONTROLLED MODEL VEHICLE HAVING COORDINATED SOUND EFFECTS SYSTEM

Harry B. Collier, Highlands Ranch, CO 23 October 1990 {Class 446/409}; filed 16 February 1989

This radio-controlled model vehicle contains a sound effects system under microprocessor control which produces vehicle sounds appropriate

to the actions of the vehicle, as controlled by radio signals, such as motor noise, gear shifting, tire squealing, etc.--DWM

4,945,806

43.75.Tv FIBER OPTIC MUSICAL INSTRUMENT DIGITAL INTERFACE

Raymond Merrill, Jr., Livermore, CA 7 August 1990 (Class 84/645); 19 January 1989

"The fiber optic musical instrument digital interface (MIDI) is a con- vcrtcr that transforms electrical MIDI signals from an electronic musical instrument (or electronic musical device) into light signals. These light signals travel down a fiber optic cable to another fiber optic MIDI link where they are converted back into their original electrical form and output to another electronic musical instrument (or electronic musical device). The advantages of this type of communication between electronic musical instruments arc electrical noise immunity, fast data transfer and long com- munication lcngth."--DWM

4,966,164

43.80.Gx COMBINED SOUND GENERATING DEVICE AND ELECTRICAL ACUPUNCTURE DEVICE AND METHOD FOR USING THE SAME

Ronnie Colsen, Alexander Kairis, and Andrew L. Deller, assignors to Tradatlantex AG

30 October 1990 (Class 128/789); filed in Japan 29 December 1987

The stated purpose of this device is for the treatment of withdrawal symptoms caused by smoking, alcohol, narcotic drugs, or any other type of addiction. A transducer (called a "buzzer") is placed at the entrance to the ear canal. It has an outer ring that acts as one electrode for an acupuncture voltage. The other electrode is a short acupuncture needle that is clamped

2485 J. Acoust. Soc. Am. 89(5), May 1991 0001-4966/91/052485-02500.80 ¸ 1991 Acoust. Soc. of Am.; Patent Reviews 2485

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