Sound generator wearable on the head, signal processor and method for operating a sound generator or a signal processor

Sound generator wearable on a head, comprising:

• a first sound generator element on a first side;
• and
• a second sound generator element on a second side,
• wherein at least a first sound transducer and a second sound transducer are arranged in the first sound generator element such that sound emission directions of the first sound transducer and the second sound transducer are parallel or deviate by less than 30° from a parallel emission direction, and wherein a third sound transducer and a fourth sound transducer are arranged in the second sound generator element such that sound emission directions of the third sound transducer and the fourth sound transducer are parallel to one another or deviate by less than 30° from a parallel emission direction,
• a signal processor to generate, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz,
• wherein the signal processor comprises a side signal generator that is configured to generate one or several side signals from the first input channel and the second input channel, and
• wherein the signal processor is configured to determine the first control signal, the second control signal, the third control signal and the fourth control signal by using the one or several side signals,
• or
• wherein the signal processor comprises:
• a further side signal generator or a side signal modifier to generate at least one further side signal;
• and a further side signal combiner to combine the further side signal with another left channel and a right channel before branching into two respective signal paths or after branching into the respective signal paths,
• or
• wherein the signal processor comprises:
• a side signal generator for generating a first side signal and a second side signal from the first input channel and the second input channel;
• a first side signal combiner for combining the first side signal with the first input channel;
• a second side signal combiner for combining the second side signal with the second input channel;
• a first branch element for branching an output signal of the first side signal combiner into a first signal path for the first control signal and into a second signal path for the second control signal;
• and a second branch element for branching an output signal of the second side signal combiner into a third signal path for the third control signal and into a fourth signal path for the fourth control signal.

Signal processor, comprising:

• a first input for a first input channel;
• a second input for a second input channel,
• wherein the signal processor is configured to generate, from the first input channel and the second input channel, a first control signal for a first sound transducer and a second control signal for a second sound transducer on a first side of a sound generator, and to generate a third control signal for a third sound transducer and to generate a fourth control signal for a first sound transducer on a second side of the sound generator;
• and
• a wired or wireless interface for outputting the first control signal, the second control signal, the third control signal and the fourth control signal,
• wherein the signal processor comprises:
• a side signal generator for generating a first side signal and a second side signal from the first input channel and the second input channel;
• a first side signal combiner for combining the first side signal with the first input channel;
• a second side signal combiner for combining the second side signal with the second input channel;
• a first branch element for branching an output signal of the first side signal combiner into a first signal path for the first control signal and into a second signal path for the second control signal;
• and a second branch element for branching an output signal of the second side signal combiner into a third signal path for the third control signal and into a fourth signal path for the fourth control signal,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters and a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein the first plurality of bandpass filters and the second plurality of bandpass filters are formed orthogonally to one another, such that a bandpass channel of the first plurality of bandpass filters comprises a frequency pass band that corresponds to a frequency stop band in the second plurality of bandpass filters,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters, wherein a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein a third signal path for the third control signal comprises the first plurality of bandpass filters, and wherein a fourth signal path for the fourth control signal comprises the second plurality of bandpass filters, wherein the first sound transducer is arranged horizontally next to the second sound transducer and wherein the fourth sound transducer is arranged horizontally next to the third sound transducer, or wherein the first plurality of bandpass filters comprise even bandpass filters and a second plurality of bandpass filters comprise odd bandpass filters.

Method for operating a sound generator with a first sound generator element on a first side and a second sound generator element on a second side, comprising:

• emitting sound by a first sound transducer and a second sound transducer in the first sound generator element, such that sound emission directions of the first sound transducer and the second sound transducer are parallel or deviate by less than 30° from a parallel emission direction;
• emitting sound by a third sound transducer and a fourth sound transducer in the second sound generator element, such that sound emission directions of the third sound transducer and the fourth sound transducer are parallel to one another or deviate by less than 30° from a parallel emission direction, and
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises:
• using a first input for the first input channel;
• using a second input for the second input channel;
• using a first branch element connecting the first input to a first signal path for the first sound transducer and to a second signal path for the second sound transducer;
• or using a second branch element connecting the second input to a third signal path for the third sound transducer and to a fourth signal path for the fourth sound transducer, wherein at least one signal path of the first signal path and the second signal path or at least one signal path of the third signal path and the fourth signal path comprises a phase shifter, and wherein the first signal path comprises a first plurality of bandpass filters and the second signal path comprises a second plurality of bandpass filters, wherein the first plurality of bandpass filters or the second plurality of bandpass filters are configured orthogonal to one another, such that a bandpass channel of the first plurality of bandpass filters comprises a frequency pass band that corresponds to a frequency stop band in the second plurality of bandpass filters,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises generating one or several side signals from the first input channel and the second input channel, and determining the first control signal, the second control signal, the third control signal and the fourth control signal by using the one or several side signals,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises:
• generating at least one further side signal;
• and combining the further side signal with the other left channel and the right channel before branching into two respective signal paths or after branching into the respective signal paths,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, generating comprises:
• generating a first side signal and a second side signal from the first input channel and the second input channel;
• first combining the first side signal with the first input channel;
• second combining the second side signal with the second input channel;
• branching an output signal of the first combining into a first signal path for the first control signal and into a second signal path for the second control signal;
• and branching an output signal of the second combining into a third signal path for the third control signal and into a fourth signal path for the fourth control signal.

Method for operating a signal processor with a first input for a first input channel and a second input for a second input channel, comprising:

• generating, from the first input channel and the second input channel, a first control signal for a first sound transducer and a second control signal for a second sound transducer on a first side of a sound generator, and a third control signal for a third sound transducer and a fourth control signal for a fourth sound transducer on a second side of the sound generator;
• and
• outputting, via a wired or wireless interface, the first control signal, the second control signal, the third control signal and the fourth control signal,
• wherein the method further comprises generating a first side signal and a second side signal from the first input channel and the second input channel;
• first combining the first side signal with the first input channel;
• second combining the second side signal with the second input channel;
• branching an output signal of the first combining into a first signal path for the first control signal and into a second signal path for the second control signal;
• and branching an output signal of the second combining into a third signal path for the third control signal and into a fourth signal path for the fourth control signal,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters and a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein the first plurality of bandpass filters and the second plurality of bandpass filters are formed orthogonally to one another, such that a bandpass channel of the first plurality of bandpass filters comprises a frequency pass band that corresponds to a frequency stop band in the second plurality of bandpass filters,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters, wherein a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein a third signal path for the third control signal comprises the first plurality of bandpass filters, and wherein a fourth signal path for the fourth control signal comprises the second plurality of bandpass filters, wherein the first plurality of bandpass filters comprise even bandpass filters and a second plurality of bandpass filters comprise odd bandpass filters.

A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method for operating a sound generator with a first sound generator element on a first side and a second sound generator element on a second side, the method comprising:

• emitting sound by a first sound transducer and a second sound transducer in the first sound generator element, such that sound emission directions of the first sound transducer and the second sound transducer are parallel or deviate by less than 30° from a parallel emission direction;
• emitting sound by a third sound transducer and a fourth sound transducer in the second sound generator element, such that sound emission directions of the third sound transducer and the fourth sound transducer are parallel to one another or deviate by less than 30° from a parallel emission direction;
• and
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises:
• using a first input for the first input channel;
• using a second input for the second input channel;
• using a first branch element connecting the first input to a first signal path for the first sound transducer and to a second signal path for the second sound transducer;
• or using a second branch element connecting the second input to a third signal path for the third sound transducer and to a fourth signal path for the fourth sound transducer, wherein at least one signal path of the first signal path and the second signal path or at least one signal path of the third signal path and the fourth signal path comprises a phase shifter, and wherein the first signal path comprises a first plurality of bandpass filters and the second signal path comprises a second plurality of bandpass filters, wherein the first plurality of bandpass filters or the second plurality of bandpass filters are configured orthogonal to one another, such that a bandpass channel of the first plurality of bandpass filters comprises a frequency pass band that corresponds to a frequency stop band in the second plurality of bandpass filters,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises generating one or several side signals from the first input channel and the second input channel, and determining the first control signal, the second control signal, the third control signal and the fourth control signal by using the one or several side signals,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, wherein the generating comprises:
• generating at least one further side signal;
• and combining the further side signal with the other left channel and the right channel before branching into two respective signal paths or after branching into the respective signal paths,
• or
• generating, from a first input channel and from a second input channel, a first control signal for the first sound transducer, a second control signal for the second sound transducer, a third control signal for the third sound transducer and a fourth control signal for the first sound transducer, wherein the first control signal and the second control signal are out of phase, or wherein the third control signal and the fourth control signal are out of phase, or wherein the first to fourth control signals comprise a frequency range between 500 Hz and 1500 Hz, generating comprises:
• generating a first side signal and a second side signal from the first input channel and the second input channel;
• first combining the first side signal with the first input channel;
• second combining the second side signal with the second input channel;
• branching an output signal of the first combining into a first signal path for the first control signal and into a second signal path for the second control signal;
• and branching an output signal of the second combining into a third signal path for the third control signal and into a fourth signal path for the fourth control signal.

A non-transitory digital storage medium having a computer program stored thereon to perform, when said computer program is run by a computer, a method for operating a signal processor with a first input for a first input channel and a second input for a second input channel, the method comprising:

• generating, from the first input channel and the second input channel, a first control signal for a first sound transducer and a second control signal for a second sound transducer on a first side of a sound generator, and a third control signal for a third sound transducer and a fourth control signal for a fourth sound transducer on a second side of the sound generator;
• and
• outputting, via a wired or wireless interface, the first control signal, the second control signal, the third control signal and the fourth control signal,
• wherein the method further comprises generating a first side signal and a second side signal from the first input channel and the second input channel;
• first combining the first side signal with the first input channel;
• second combining the second side signal with the second input channel;
• branching an output signal of the first combining into a first signal path for the first control signal and into a second signal path for the second control signal;
• and branching an output signal of the second combining into a third signal path for the third control signal and into a fourth signal path for the fourth control signal,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters and a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein the first plurality of bandpass filters and the second plurality of bandpass filters are formed orthogonally to one another, such that a bandpass channel of the first plurality of bandpass filters comprises a frequency pass band that corresponds to a frequency stop band in the second plurality of bandpass filters,
• or
• wherein a first signal path for the first control signal comprises a first plurality of bandpass filters, wherein a second signal path for the second control signal comprises a second plurality of bandpass filters, wherein a third signal path for the third control signal comprises the first plurality of bandpass filters, and wherein a fourth signal path for the fourth control signal comprises the second plurality of bandpass filters, wherein the first plurality of bandpass filters comprise even bandpass filters and a second plurality of bandpass filters comprise odd bandpass filters.