A musical instrument, including: an acoustic portion configured to generate sounds in accordance with a vibration; a plurality of soundboard braces attached to a flat surface of the acoustic portion; a bracket supported by two of the plurality of soundboard braces; and an acoustic transducer supported by the bracket and configured to vibrate the acoustic portion based on an acoustic signal inputted thereto, wherein the bracket is disposed so as to bridge the two of the plurality of soundboard braces, and the acoustic transducer vibrates the acoustic portion at a position between the two of the plurality of soundboard braces.

A speaker system includes one or more rotating speakers (or speakers with rotating reflectors) that are synchronized in absolute angular position to another rotating speaker or synchronized to audio effects to generated by a signal processing system driving a stationary or rotary speaker. Knowledge of absolute angular position in a multi-rotor speaker array or signal processing system allows for control of rotary position to accomplish acoustic effects otherwise not possible, such as matched-velocity profiles with differential phase control and motion profiles that are not based on simple rotation.

According to some aspects, an apparatus is provided for controlling the production of music, the apparatus comprising at least one processor, and at least one processor-readable storage medium comprising processor-executable instructions that, when executed, cause the at least one processor to receive data indicative of acceleration of a user device, detect that the acceleration of the user device has exceeded a predetermined threshold based at least in part on the received data, determine that no beat point has been triggered by the apparatus for at least a first period of time, and trigger a beat point in response to said detecting that the acceleration of the user device has exceeded the predetermined threshold and said determining that no beat point has been triggered for at least the first period of time.

According to some aspects, an apparatus is provided for controlling the production of music, the apparatus comprising at least one processor, and at least one processor-readable storage medium comprising processor-executable instructions that, when executed, cause the at least one processor to receive data indicative of acceleration of a user device, detect that the acceleration of the user device has exceeded a predetermined threshold based at least in part on the received data, determine that no beat point has been triggered by the apparatus for at least a first period of time, and trigger a beat point in response to said detecting that the acceleration of the user device has exceeded the predetermined threshold and said determining that no beat point has been triggered for at least the first period of time.

The musical instrument includes: a pickup that acquires an electric sound signal corresponding to a sound performed on the musical instrument; effector circuitry that imparts an effect to the acquired electric sound signal; a vibrator that produces mechanical vibration corresponding to the effect-imparted sound signal; and a transmission device that transmits the mechanical vibration, produced by the vibrator, to the body of the musical instrument with a characteristic having a fundamental frequency region of the musical instrument suppressed. The electric sound signal corresponding to the performed sound is imparted with an effect, the vibrator is driven by the effect-imparted sound signal, and a mechanical vibration sound is generated from the body of the musical instrument. The thus-generated mechanical vibration sound is audibly generated from the body as a vibration sound additional to the performed sound, which allows a user to experience a performance feeling that has never existed before.

A reverberation device includes a mechanical delay device in the form of a coil from an elongate strip of metal in an example embodiment. The length can be greater than an order of magnitude greater than the height dimension. The height dimension is greater than the thickness dimension. The mechanical delay device can be fed an audio signal from an electro-mechanical transducer and output mechanical vibrations to a mechanical-electrical transducer. The coil can be folded at the center of the coil so that the input and output are both on the outside of the coil. The input path is interleaved with the output path for the signal in the coil.

A reverberation device includes a mechanical delay device in the form of a coil from an elongate strip of metal in an example embodiment. The length can be greater than an order of magnitude greater than the height dimension. The height dimension is greater than the thickness dimension. The mechanical delay device can be fed an audio signal from an electro-mechanical transducer and output mechanical vibrations to a mechanical-electrical transducer. The coil can be folded at the center of the coil so that the input and output are both on the outside of the coil. The input path is interleaved with the output path for the signal in the coil.

In a method and apparatus for magnetic resonance imaging with a music-based gradient curve, a magnetic resonance sequence and a piece of music are provided to a controller of a magnetic resonance apparatus. The piece of music is modified in the controller by taking into account at least one acoustic resonance parameter that characterizes at least one acoustic resonance frequency of the magnetic resonance apparatus, so a modified piece of music is generated. A gradient curve of the magnetic resonance sequence is adjusted using the modified piece of music, so an adjusted magnetic resonance sequence is generated. Magnetic resonance image data of the examination object is acquired by operation of the apparatus with of the adjusted magnetic resonance sequence.

In a method and apparatus for magnetic resonance imaging with a music-based gradient curve, a magnetic resonance sequence and a piece of music are provided to a controller of a magnetic resonance apparatus. The piece of music is modified in the controller by taking into account at least one acoustic resonance parameter that characterizes at least one acoustic resonance frequency of the magnetic resonance apparatus, so a modified piece of music is generated. A gradient curve of the magnetic resonance sequence is adjusted using the modified piece of music, so an adjusted magnetic resonance sequence is generated. Magnetic resonance image data of the examination object is acquired by operation of the apparatus with of the adjusted magnetic resonance sequence.

A vibratory structure includes: a vibratory body; piezoelectric elements mounted to a surface of the vibratory body; and resonant circuits configured to operate in response to electrical energy generated by the piezoelectric elements so as to cause a change in a damping characteristic of the vibratory body at a target frequency upon vibration of the vibratory body, and assuming that an axis of the vibratory body in a direction of principal strains is a reference axis, each of the piezoelectric elements is fixed at fixing regions at different locations in the direction of the reference axis.