# US 2014/0196593 A1 · System for Remotely Generating Sound from a Musical Instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196593 A1 - Document ID: US20140196593A1 - Status: Published application - Kind: A1 - Application number: 14/215,066 - Filed: 2014-03-17 - Published: 2014-07-17 - Earliest claimed: 2007-01-03 - Inventors: Eric Aaron Langberg - Web page: https://patentgrep.com/patent/US20140196593A1 ## CPC - G10F 1/20: to be plucked - G10D 3/00: Details of, or accessories for, stringed musical instruments, e.g. slide-bars - G10D 3/02: Resonating means, horns or diaphragms - G10F 1/16: Stringed musical instruments other than pianofortes (pianofortes G10F1/02, G10F1/04) - G10F 5/00: Details or accessories - G10H 3/14: using mechanically actuated vibrators with pick-up means (G10H3/24 takes precedence) - G10H 3/186: {Means for processing the signal picked up from the strings (filtering G10H1/12)} - G10H 3/22: using electromechanically actuated vibrators with pick-up means (G10H3/24 takes precedence) - G10H 3/24: incorporating feedback means, e.g. acoustic - G10H 3/26: using electric feedback - G10H 2220/211: for microphones, i.e. control of musical parameters either directly from microphone signals or by physically associated peripherals, e.g. karaoke control switches or rhythm sensing accelerometer within the microphone casing - G10H 2220/525: Piezoelectric transducers for vibration sensing or vibration excitation in the audio range; Piezoelectric strain sensing, e.g. as key velocity sensor; Piezoelectric actuators, e.g. key actuation in response to a control voltage - G10F: AUTOMATIC MUSICAL INSTRUMENTS (non-musical aspects of toy instruments A63H5/00; sound recording or reproducing G11B; working in association with recording or reproducing apparatus G11B31/02) - G10D: STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR (organs, harmoniums or similar wind musical instruments with associated blowing apparatus G10B; pianos, harpsichords, spinets or similar stringed musical instruments with one or more keyboards G10C; automatic musical instruments G10F; electrophonic musical instruments in which tones are generated by electromechanical means G10H) - G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE ## Abstract A system for remotely generating sound from a musical instrument. In one embodiment, the system includes an input configured to receive a signal representative of the sound of a first musical instrument, an exciter for converting the signal to mechanical vibrations, and a coupling interface for coupling the mechanical vibrations into a second musical instrument. ## Claims ### Claim 1 A system comprising: an input configured to receive an externally generated signal from an electric musical instrument; at least one exciter configured to convert the signal to mechanical vibrations; at least one coupling interface configured to couple the mechanical vibrations to an acoustic instrument; and a removable attachment means for securing at least the at least one coupling interface to the acoustic instrument. ### Claim 2 (depends on 1) The system of claim 1 wherein the removable attachment means includes a cam for exerting pressure on an element of the acoustic instrument. ### Claim 3 (depends on 1) The system of claim 1 further comprising a microphone. ### Claim 4 (depends on 1) The system of claim 1 wherein the system is housed in a single structure. ### Claim 5 (depends on 1) The system of claim 1 wherein the coupling interface is configured to apply pressure to a saddle of the acoustic instrument when the system is secured to the acoustic instrument. ### Claim 6 A system comprising: an input configured to receive an externally generated signal representative of sound; at least one exciter configured to convert an electrical signal to mechanical vibrations; at least one coupling interface configured to couple the mechanical vibrations to an acoustic instrument such that the acoustic instrument generates audible sounds in response to the mechanical vibrations; and a calibration system configured to measure an output response of the acoustic instrument, compare the output response to a target response, generate an error signal, and modify the externally generated signal based on the error signal. ### Claim 7 (depends on 5) The system of claim 5 wherein the calibration system includes a mechanical or acoustic transducer to measure the output response of the acoustic instrument. ### Claim 8 (depends on 5) The system of claim 5 wherein the calibration system includes a digital signal processor. ### Claim 9 (depends on 7) The system of claim 7 wherein the digital signal processor is configured to generate a calibration signal for application to the exciter, receive a first feedback signal representing the audible sounds, compare the first feedback signal to an expected response, and generate a corrective transfer function such that a modification of the calibration signal by the corrective transfer function results in a second feedback signal representing the audible sounds which more closely matches the expected response than the first feedback signal. ### Claim 10 (depends on 9) The system of claim 9 wherein the externally generated signal is sent to a processing circuit which modifies the externally generated signal by the corrective transfer function. ### Claim 11 (depends on 10) The system of claim 10 further comprising a first feedback path which is compared to a mechanical transfer function to generate a first error signal and a second feedback path which is compared to an acoustic transfer function to generate a second error signal, wherein the first error signal and the second error signal are analyzed by the digital signal processor to create the corrective transfer function. ### Claim 12 A system comprising: an input configured to receive an externally generated signal from an electric musical instrument; at least one exciter configured to convert the signal to mechanical vibrations, wherein the at least one exciter is an electromechanical transducer having a substantially linear shape, including a width and a length, and wherein the length is at least twice the width, and wherein the transducer is configured to be installed to an interior surface of a sound board of an acoustic guitar, such that an electrical signal applied to the electromechanical transducer causes the electromechanical transducer to exert a force on the sound board. ### Claim 13 (depends on 12) The system of claim 12 configured such that the application of a changing voltage to the electromechanical transducer produces mechanical vibration in the sound board.