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2. 发明授权

US4143575A Electronic sound generating system for a stringed musical instrument 失效
标题翻译：用于弦乐器的电子声音发生系统
公开(公告)号：US4143575A
公开(公告)日：1979-03-13
申请号：US728865
申请日：1976-10-01
申请人： Richard C. Oliver
发明人： Richard C. Oliver
IPC分类号： G10H3/18 , G10H1/00
CPC分类号： G10H3/182 , G10H2220/171 , Y10S84/27
摘要： An electronic sound generating system is disclosed for use with a stringed musical instrument such as a guitar. An RF oscillator is connected with an electrically conductive string of the instrument and a pickup coil is positioned adjacent to the string so that RF signals of varying amplitude are induced in the coil due to vibration of the string resulting from playing of the instrument. The variable amplitude RF signals are detected and an audio signal produced therefrom that is coupled to a speaker, for example. A stereo output can be provided by placing dual pickup coils adjacent to the string with the pickup coils being positioned normal to one another. Each string of the musical instrument can be separately provided with an RF current of a common frequency or different frequencies. A separate pickup coil is provided for each string, with two such coils being provided for each string if the output is to be a stereo output, and the signals from the pickup coils are processed in separate channels each of which includes a filter tuned to the frequency of the RF signal impressed on the associated string. Thus, separate audio outputs from each string are available for independent signal processing. Conventional techniques may therefore be employed to produce effects normally associated with electronic music synthesizers. In addition, a vibration sustaining device can also be utilized for each string to continue or alter vibration of the string.
摘要翻译：公开了一种用于诸如吉他的弦乐器的电子声音产生系统。 RF振荡器与仪器的导电线连接，并且拾音线圈位于弦的附近，使得由于乐器的播放引起的弦的振动，在线圈中感应到变化幅度的RF信号。例如，检测可变幅度RF信号和从其产生的音频信号，其耦合到扬声器。可以通过将拾音器线圈放置在彼此正交的方式将双重拾音线圈放置在弦线附近来提供立体声输出。乐器的每一串可以单独提供共同频率或不同频率的RF电流。为每个串提供单独的拾取线圈，如果输出是立体声输出，则为每个串提供两个这样的线圈，并且来自拾取线圈的信号在单独的通道中被处理，每个通道包括调谐到 RF信号的频率施加在相关联的串上。因此，每个串的独立音频输出可用于独立的信号处理。因此，常规技术可以用于产生通常与电子音乐合成器相关联的效果。此外，振动维持装置也可以用于每个弦以继续或改变弦的振动。

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