WO2023019282A1

WO2023019282A1 - Recognition device for recognizing different gripping positions on a wind instrument

Info

Publication number: WO2023019282A1
Application number: PCT/AT2022/060285
Authority: WO
Inventors: Andreas Hauser
Original assignee: Andreas Hauser
Priority date: 2021-08-17
Filing date: 2022-08-16
Publication date: 2023-02-23
Also published as: AT525420A1

Abstract

The present invention relates to a recognition device (10) for recognizing different gripping positions (GP) on a wind instrument (100) having an instrument cavity (110) with closable instrument openings (120), the recognition device comprising: - a main body (20) having a fastening interface (22) with an opening (24) for fastening to a mating fastening interface (132) with a mating opening (134) on the wind instrument (100) for a fluidic connection between the opening (24) and the mating opening (134); - generating means (30) for generating an excitation signal (ES) and for transmitting the excitation signal (ES) into the instrument cavity (110) via the opening (24) of the fastening interface (22); - a receiving means (40) for receiving a resonance signal (RS) of the wind instrument (100) from the instrument cavity (110) via the opening (24), said resonance signal having been at least partially induced by the excitation signal (ES); - an analysis unit (50) for analyzing the resonance signal (RS) with respect to different gripping positions (GP) on the wind instrument (100) and for outputting a gripping position signal (GS) on the basis of a recognized gripping position (GP).

Description

DETECTION DEVICE FOR DETECTING DIFFERENT GRIP POSITIONS ON A WIND INSTRUMENT

The present invention relates to a detection device for detecting different gripping positions on a wind instrument, a wind instrument with such a detection device, a detection method for detecting different gripping positions on a wind instrument, and a computer program product for carrying out such a detection method.

It is known that wind instruments have an instrument cavity which varies in length and size depending on the type of instrument. While playing a wind instrument, an oscillating column of air forms in the instrument cavity, which is used to generate sound. Instrument ports on the side of the instrument cavity can usually be opened and closed with fingers or with flaps. This allows the length and type of air column within the instrument cavity to be varied so that tones of different pitches can be produced.

It is also known that substitute instruments are used for silent practice of wind instruments. It is known, for example, to provide replacement instruments based on flutes, clarinets or similar wind instruments which do not have an instrument cavity for forming an air column. Rather, these substitute instruments are equipped with gripping areas at which gripping positions can be taken with the fingers, which correlate or even match the gripping positions on the instrument openings of the real wind instrument. On the basis of electronic recognition, which can be recorded as the grip position on the corresponding grip sections, the desired pitch can now be determined digitally and a digital sound can be generated.

A disadvantage of the known solutions, however, is that such replacement instruments have to be purchased in addition to real wind instruments that are already available, so that correspondingly high acquisition costs arise for the user. In addition, such replacement instruments usually differ significantly from real wind instruments in terms of feel and handling. Is it necessary or desirable for the user of a wind instrument to be quiet or completely still To practice a wind instrument, this has so far only been possible with replacement instruments and the associated disadvantages and costs.

It is therefore the object of the present invention to at least partially eliminate the disadvantages described above. In particular, it is the object of the present invention to create a possibility for playing a wind instrument with digital sound generation softly or quietly in a cost-effective and simple manner.

The above object is achieved by a recognition device with the features of claim 1, a wind instrument with the features of claim 8, a recognition method with the features of claim 9 and a computer program product with the features of claim 16. Further features and details of the invention result from the dependent claims, the description and the drawings. Features and details that are described in connection with the detection device according to the invention also apply, of course, in connection with the wind instrument according to the invention, the detection method according to the invention and the computer program product according to the invention and vice versa, so that the disclosure of the individual aspects of the invention is always referred to reciprocally can be.

The core idea of the invention is to provide a detection device for detecting different gripping positions on a wind instrument. Such a wind instrument is equipped with an instrument cavity with closable instrument openings. The detection device has a base body, which has a fastening interface with an opening for fastening to a counter-fastening interface with a counter-opening of the wind instrument for a fluid-communicating connection between the opening and the counter-opening. In addition, the detection device is provided with generating means for generating an excitation signal and for sending the excitation signal through the opening of the attachment interface into the instrument cavity. With the aid of a receiving means, the detection device is able to detect a resonance signal of the wind instrument from the instrument cavity via the opening, which signal is at least characterized by the excitation signal has been partially stimulated to receive. The detection device is also equipped with an evaluation unit for evaluating the resonance signal with regard to different gripping positions on the wind instrument and for outputting a gripping position signal based on a detected gripping position.

The core idea according to the invention is based on the fact that different gripping positions should be recorded on a real wind instrument and not on a replacement instrument. This should be done in a particularly simple and cost-effective manner and in particular without a high design effort for electronic contacting of all instrument openings. It should be pointed out here that the instrument openings can be covered both directly by the user's fingers and indirectly via flaps and lever elements.

The core idea according to the invention is fulfilled in that a resonance system is made available. This resonance system relies on introducing an excitation signal into the instrument cavity. The introduction of an excitation signal means that this signal, which is designed in particular as an acoustic signal, is affected by frequency and amplitude. The introduction of an excitation signal thus leads to the formation of an oscillating column of air in the instrument cavity, similar to normal playing operation. However, it is possible to make the excitation signal available at a significantly lower volume and/or with defined frequencies than a normal playing signal when using the wind instrument. As will be explained later, an excitation signal is preferably generated below the hearing limit of the user or below the volume of ambient noise or noise of use of the wind instrument. This allows the air column within the instrument cavity to be excited with a very low generation signal. However, depending on the covering situation of the instrument openings and thus on the gripping position, the vibration state of this air column changes. If, for example, the fundamental tone of the wind instrument is used as the generation signal and all instrument openings are also closed, the air column oscillates in the fundamental tone, i.e. the natural frequency of the instrument body, but at the same time in a large number of overtones. However, if the excitation signal remains the same, the resonance signal will change depending on the uncovered openings in the instrument cavity. This resonance signal or its change can now again from a Receiving means are detected within the detection device. In the simplest case, the receiving means is a microphone unit, which can also pick up the resonance signal again as an acoustic signal. In other words, a system of signal excitation by the excitation signal and a resonance situation in the form of the resonance signal that is completely independent of normal playing operation of the wind instrument can now be formed by a detection device according to the invention. This resonance situation can be recorded using the receiving means and then evaluated using the evaluation unit.

As can be seen from the previous paragraphs, the resonance signal correlates not only with the excitation signal, but also with the opening and closing situation of the instrument ports. Since the opening and closing situation of the instrument opening corresponds in each case to a gripping position for the wind instrument and thus to a defined tone of a defined pitch, this correlation can be used for evaluation with regard to identifying different gripping positions. The evaluation of the resonance signal can include, for example, a frequency evaluation, an amplitude evaluation or the like. In particular, as will be explained in more detail later, a neural network or another form of artificial intelligence is used in order to enable an association between the received resonance signal and a specifically matching gripping position. As soon as a specific gripping position has now been recognized by the evaluation unit on the basis of the resonance signal, this recognized gripping position can be output as a gripping position signal. In the simplest case, such a gripping position signal can directly be a digitally generated tone of the pitch appropriate for this gripping position. However, it is also possible that the gripping position signal passes on this sound information, which is selected by the gripping position by the user of the recognition device, to a sound generator. Such a digital tone generator can be integrated into the detection device or can be designed separately from it. It is also possible to provide amplification elements in addition to a tone generator, in order not only to form the generated tone digitally within the detection device, but also to make it available for acoustic tapping, for example via a headphone connection, directly on the detection device. As can be seen from the above explanations, a specific resonance signal can now be received by the receiving means depending on the gripping position. The different resonance signals are specific to the respective gripping position and can be assigned to the current gripping position in real time through this specific correlation. It is thus possible to use the evaluation unit to recognize the successive gripping positions as such in real time over a period of time during use of the detection device and to provide and output gripping position signals corresponding to the actual gripping position on the wind instrument in real time.

It is thus possible for a detection device according to the invention to be used on a real wind instrument in order to make this detection functionality available there without the need for tone detection in the usual acoustic manner or gripping position detection by direct tapping at individual instrument openings. This very simple and thus above all compact formability makes it possible to provide the attachment interface as the only interface for the detection between the detection device and the wind instrument. This attachment interface is arranged with the opening, for example, in the area of a sound emission opening of the instrument cavity. However, it is preferred if the detection device can be used as an alternative mouthpiece, as will be explained later. It can thus be placed on the wind instrument instead of a real mouthpiece. The fastening interface and the counter-fastening interface thus not only form the fluid-communicating connection between the opening and the counter-opening, but also close off this fluid-communicating connection, preferably in a fluid-tight and/or acoustically tight manner from the environment.

Thus, it is now possible to use a real wind instrument with a detection device according to the invention, without an air column that vibrates well audibly, which is usual in normal use, forming inside the instrument cavity. In addition, the current gripping position can be picked up very easily by the correlation between the generated signal and the resonance signal, so that essentially any wind instrument can be retrofitted with this form of detection functionality. The key here is to adapt one Evaluation logic, either by training an artificial intelligence or by providing appropriate algorithms or maps. The only mechanical adaptation to different wind instruments is the mechanical adaptation of the geometric configuration of the attachment interface and the opening to the geometric configuration of the counter attachment interface and the counter opening specific to the respective wind instrument.

In addition to the advantage that such a detection device can be used on a real wind instrument, the detection device will make its functionality available without the usual tone generation. In particular, the detection can be carried out with a constant excitation signal. These do not have a specific frequency or contain a large number of peaks. The design in the form of a frequency comb is also conceivable, so that if there are a large number of peaks, these are attenuated more or less in a characteristic manner depending on the gripping position.

While in principle the detection device can be used in isolation, it is preferably integrated in a mouthpiece and also has the possibility of an injection opening, which will be explained later. This makes it possible to provide a complete replica of the mouthpiece, so that the wind instrument can be used with the detection device in an almost identical manner as would be the case with a normal acoustic mouthpiece. Of course, the detection device can be designed with other necessary electronic components, such as sound processors, corresponding signaling interfaces in a wired or wireless manner, or battery devices.

It can bring advantages if, in a detection device according to the invention, the base body is designed as a mouthpiece for the wind instrument with a blowing-in section and a resonance section, the resonance section having at least the generating means and the receiving means and being acoustically and/or fluid-tightly separated from the blowing-in section. As has already been indicated, the detection device will preferably replace a complete mouthpiece of a wind instrument. This allows the user to switch between a normal manual use situation with tone generation and a practice situation or silent use situation can change very easily and quickly with the detection device according to the invention. He only has to put the mouthpiece in the form of the recognition device in place of the mouthpiece of the real wind instrument. Since the mouthpieces of wind instruments are often plugged in or clamped, this replacement is very easy and quick. The provision of the mouthpiece with the blowing portion allows the usual use manipulation with blowing of a blowing stream to be provided also with the detection device. In order not to mix the injected air with the resonance functionality, as described above, the resonance section is therefore acoustically and/or fluid-tightly separated from the injection section.

It can bring advantages if, in a detection device according to the preceding paragraph, the blowing-in section has a blowing-in opening for introducing a blowing-in air flow, the blowing-in section having at least one sensor means for detecting at least one blowing-in parameter, in particular one of the following:

- injection angle,

- blowing speed,

- injection pressure,

- Blow-in amount.

The above list is a non-exhaustive list. By detecting one or more blowing-in parameters, it is also possible to acquire additional information, which is output in particular as blowing-in information or blowing-in signal in addition to the information about the gripping position in the form of the gripping position signal. For example, the octave that the user desires by selecting this blow-in angle can be determined via the blow-in angle, the blow-in speed or the like. The tone is defined in combination with the gripping position signal and the octave of the tone is defined via the blow-in angle, so that on the basis of these two pieces of information in combination, exactly the tone desired by the user of the recognition device is generated digitally. Additional information, such as the desired volume, can be provided by the blowing-in speed, the blowing-in pressure and/or the Blow-in quantity are determined and superimposed with the gripping position signal. Various sensor elements or sensor means are preferably provided here, which can detect the individual injection parameters. A calibration sensor means, for example for determining the ambient pressure as a comparison value or normalization value, is also possible here within the scope of the present invention.

It can also bring advantages if, in a detection device according to the invention, the blowing-in section has an outlet opening for the outlet of a blowing-in air stream from the blowing-in section. As has been explained in the preceding paragraphs, the blowing-in section is designed for the most realistic possible formation of the blowing-in situation for the user of the wind instrument. In order to avoid overpressure within the injection section, and in particular due to the fluid-tight and/or acoustic separation from the resonance section and thus from the instrument cavity, the outlet of the injection section serves to let out the injected air flow again. A defined cross section of this outlet allows the back pressure present in the injection section to be defined and specified. The smaller the outlet cross-section, the greater the counter-pressure in this virtual mouthpiece. Adjustable or switchable loading devices are also conceivable in order to be able to provide different counter-pressure situations on the injection section for different instruments or different preferences of the user.

It is also advantageous if, in a detection device according to the invention, the blow-in section has a blow-in microphone for recording a blow-in noise. This allows additional information to be collected via an acoustic evaluation of these signals from the blow-in microphone. This additional information can also be fed back into the digital tone generator in order to enable an even more realistic generation of the tone shaping and an additional influence on the pitch. It is also possible for the noises recorded by the blow-in microphone to be acoustically mixed with the digitally generated sound based on the detected gripping position, in order to ensure an even more realistic design for the user of the detection device. Further advantages can be achieved if, in a detection device according to the invention, the generating means has a loudspeaker for generating an acoustic signal as an excitation signal and the receiving means has a receiving microphone for receiving the resonance signal as an acoustic signal. This leads to an acoustic signal chain between the generating means and the receiving means, which can be designed in a correspondingly particularly simple and cost-effective manner. In particular when selecting an excitation signal in the normal audible frequency range, this leads to a solution that can be implemented very cost-effectively, due to the cost-effective design of generating loudspeakers and receiving microphones.

Further advantages can be achieved if, in a detection device according to the invention, the generating means has a generating direction for emitting the excitation signal which is directed past a receiving direction of the receiving means. In the simplest case, the direction of generation is oriented in a different direction than the direction of reception, so that there is no direct exposure of the receiving means to the excitation signal. For example, the generation direction and the reception direction can have an acute angle with one another or can be aligned parallel. It is also possible for the generating means to be arranged closer to the instrument cavity than the receiving means in order to avoid superimposition of the resonance signal and the excitation signal received directly at the receiving means or at least to reduce this cross-influence to a minimum.

The subject of the present invention is also a wind instrument with an instrument cavity with closable instrument openings. Such a wind instrument has a detection device according to the invention, in particular in the form of a mouthpiece. A wind instrument according to the invention thus brings with it the same advantages as have been explained in detail with reference to a detection device according to the invention. The wind instrument is, for example, a flute, a transverse flute, a clarinet, a saxophone or the like. The wind instrument is preferably a variant with a mouthpiece in which the blow-in section has an edge onto which the user of the wind instrument blows. The present invention also relates to a detection method for detecting different gripping positions on a wind instrument using a detection device according to the invention, having the following steps:

- generating an excitation signal,

- introducing the generated excitation signal into an instrument cavity of the wind instrument,

- detection of at least one at least partially generated by the excitation signal resonance signal from the instrument cavity,

- Evaluation of the resonance signal with regard to different gripping positions on the wind instrument,

- Outputting a gripping position signal based on the detected gripping position.

By using a detection device according to the invention, a detection method according to the invention brings with it the same advantages as have been explained in detail with reference to a detection device according to the invention. Here, too, it should be pointed out that in the evaluation with regard to different gripping positions, there is a specific connection with regard to an acoustic resonance signal and gripping positions that can be clearly assigned. This relationship can be made available, for example, in the form of a characteristic map, an algorithmic relationship, but preferably in connection with the use of artificial intelligence. The gripping position signal can be output as a digital information signal or directly as an acoustic signal with an appropriate digital sound processor.

There can be advantages if, in a detection method according to the invention, the excitation signal is generated continuously or essentially continuously over a generation period. As an alternative to this, signal pulses are also conceivable. A uniform signal over the generation period, in particular without variation and/or without a pulsed switching on and off, means that a continuous execution of the recognition function is also guaranteed. The continuous introduction of an excitation signal can ensure the uninterrupted monitoring and detection of different gripping positions in real time, particularly in the case of rapid tone changes, which are indicated by the user of the wind instrument by rapidly changing the gripping positions.

There are also advantages if, in a detection method according to the invention, the excitation signal is generated over a generation period with a constant or essentially constant frequency and/or constant or essentially constant amplitude. In particular, a constant or essentially constant frequency allows a particularly simple and cost-effective possibility of generating the excitation signal. While the variable generation of an excitation signal, for example over a defined frequency section in a repeated manner, is basically also possible with a method according to the invention, a constant frequency for the excitation signal can result in increased and accelerated detection. It is thus possible in this way for the detection signal to be evaluated in each gripping position specifically for the respective gripping position. In the case of excitation signals that vary variably over specific frequency ranges, it may otherwise be necessary to wait until a corresponding resonance is reached in a natural frequency situation that matches the current gripping position. However, this contradicts the desire of the present invention and its goal of providing an evaluation in real time. The frequency is preferably chosen in the audible range in order to ensure a particularly inexpensive and simple construction of the detection device. In particular, the amplitude is chosen so that it is below an ambient noise level and/or below an injection noise level, which will be explained in more detail later.

It is also advantageous if at least one of the following parameters is taken into account when evaluating the resonance signal in a detection method according to the invention:

overtones,

attenuation of overtones, presence of a natural frequency.

The above list is a non-exhaustive list. The parameters can be made available directly acoustically, for example through filter technology, or else digitally through evaluation using algorithms or characteristic diagrams. However, it is preferred if, in an embodiment of the detection method according to the invention, an artificial intelligence takes over the evaluation of the resonance signal.

It is therefore advantageous if artificial intelligence is used for the evaluation of the resonance signal. This can have, for example, weighted neural networks, the artificial intelligence being trained, for example in advance by playing scales, on a similar or identical wind instrument. Deliberately wrong or faulty scales can also be recorded. It is also possible that such a trained artificial intelligence is personalized, for example by the user playing in his own scales when carrying out the recognition method or beforehand, so that he specifies the tones he wants through the defined sequence in the scale of the artificial intelligence, which, on this basis, assigns the resonance signals generated during the performance of the scale to this wish and saves it in the weighting of the artificial intelligence. As an alternative or in addition, it is of course also possible to use classic characteristic diagrams or algorithmic relationships.

It is also advantageous if, in a detection method according to the invention, the gripping position signal has identification information for identifying an incorrect gripping position and/or correction information for correcting an incorrect gripping position. An incorrect gripping position is given when it deviates from a standard gripping position, for example, or the latter is not implemented correctly because the prescribed holes or other openings in the instrument cavity do not remain completely open or not completely closed. In both cases it is possible to identify this incorrect gripping position. If desired by the user, there is the option of an automatic correction, with a high probability of a correct gripping position being suggested on the basis of the incorrect gripping position and the identification information. There are further advantages if, in a detection method according to the invention, a tone is generated digitally on the basis of the gripping position signal and in particular additionally on the basis of at least one blow-in parameter. This digitally generated sound can, for example, be output directly to headphones and thus to the user. A corresponding sound processor for generating a digital sound can be integrated into the recognition device. The same also applies to the possible integration of an amplifier for this digitally generated sound and corresponding interfaces to means of communication or even to recording means in a music studio. In connection with the above-mentioned possibility of identifying an incorrect gripping position, it is particularly advantageous if incorrect tones, wrong in the sense of "wrongly or imprecisely gripped", result in a corresponding digital tone, which is modeled in such a way that it is incorrect or imprecisely fingered tone on the original instrument. In this way, a pedagogically valuable feedback loop is closed here, which enables the user to learn the right technique for the original instrument by using the invention. Thus, it becomes possible to provide a learning effect for the user as in normal use of the instrument.

In addition, an object of the present invention is a computer program product comprising instructions which, when executed on a computer, cause it to carry out the steps of a recognition method according to the present invention. A computer program product according to the invention thus brings with it the same advantages as have been explained in detail with reference to a detection method according to the invention.

Further advantages, features and details of the invention result from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. They show schematically:

1 shows an embodiment of a wind instrument according to the invention, 2 shows the embodiment of FIG. 1 in a different gripping position,

3 shows an embodiment of a detection device according to the invention,

4 shows a further embodiment of a detection device according to the invention,

5 shows a further embodiment of a detection device according to the invention,

Fig. 6 a possibility for an excitation signal and

7 shows another possibility for an excitation signal.

FIGS. 1 and 2 show an embodiment of a wind instrument 100. This wind instrument 100 can be a transverse flute, for example. The instrument body 130, which in the case of a transverse flute is made of metal, for example, can be seen clearly. An instrument cavity 110 is formed within this instrument body 130, in which an air column is formed during normal instrument operation, which is introduced by the user of the wind instrument 100 by blowing it into a mouthpiece (not shown in FIGS. 1 and 2). The air column begins to oscillate as a result of being blown in, with the oscillation frequency and thus the pitch being able to be influenced in a defined manner by opening and closing the instrument openings 120 .

Different gripping positions GP are shown in FIGS. In FIG. 1, only the two instrument openings 120 at the right-hand end of the instrument body 130 are closed. In FIG. 2, three additional instrument openings 120 are closed by fingers 200 of the user of the wind instrument 100. In normal instrument operation, these two different gripping positions GP in FIGS. 1 and 2 lead to different tones when blowing into the blowing-in section of the real mouthpiece. In order to ensure identical digital tone generation with the same handling, the wind instrument 100 of this embodiment is equipped with a detection device 10 . This detection device 10 is provided as a detection mouthpiece 140 and replaces the real mouthpiece of the wind instrument 100. The user of the wind instrument 100 of this embodiment now blows an injection air stream into an injection section 142 of the mouthpiece 140 via an injection opening 146 . When blowing in, additional blowing parameters such as blowing pressure or blowing angle can be detected and recorded. In order to avoid excess pressure in the injection section 142, this is provided with an outlet opening 148 in order to imitate the playing feel of a real mouthpiece.

A resonant portion 144 is formed separately from the blowing portion 142 in the mouthpiece 140 of this embodiment. The core functionality for recognizing the gripping positions GP is introduced in this. A fluid-communicating connection is established with the instrument cavity 110 via a counter-opening 132 with the aid of an opening 24 . It is mechanically fixed in this position of use by attaching the mouthpiece 140 to the counter attachment interface 132 via the attachment interface 22. For use, an excitation signal ES is now output by a generating means 30, for example in the form of a loudspeaker. The excitation signal ES is preferably of a constant frequency and low amplitude, typically also of a lower amplitude than the injection noise. In addition, the frequency of the excitation signal ES is preferably arranged in the audible range.

Introduction of the excitation signal ES into the instrument cavity 110 excites vibrations in the instrument body 130 , which in turn can be received by the receiving means 40 as a resonance signal RS within the resonance section 144 . The resonance signal RS depends specifically on the current gripping position GP. In other words, the resonance signal RS in the gripping position GP in Figure 1 is different from that in the gripping position GP in Figure 2. In order, for example, to distinguish between these two resonance signals RS in both Figures 1 and 2, an evaluation unit 50 is provided, the use of artificial intelligence can carry out this evaluation.

On the basis of the above description with reference to FIGS. 1 and 2, it is easy to see that the wind instrument 100 can now be handled in the manner accustomed by the user and in particular with regard to the haptics on the Instrument body 130 is identical to the original handling, since the identical real instrument body 130 is used.

FIG. 3 shows an embodiment of the recognition device 10 which is based on the recognition device 10 used in FIGS. It is also easy to see here that the evaluation unit 50 now generates a gripping position signal GS. In addition, a blow-in microphone 149 is additionally arranged here within the blow-in section 142 . This allows blow-in noise to be recorded and either evaluated acoustically or mixed into a digitally generated signal in order to ensure even greater realism. A sensor means 150 is also shown here schematically, which can detect injection parameters, for example, with the aid of pressure sensors. In the embodiment of FIG. 3, a parallel configuration of the generating direction EZR of the generating means 30 and the receiving direction EMR of the receiving means 40 is also shown, which are additionally arranged offset as seen from the opening 24 . This makes it possible to almost rule out a cross-influence on the resonance signal RS by the excitation signal ES received directly at the receiving means 40 .

FIG. 4 shows a detection device 10 of a particularly simple embodiment. No mouthpiece is shown here, but rather a detection device without a blow-in section 142, and thus exclusively providing the resonance function. This can be placed on the instrument cavity 120 from both sides, ie also from the dispensing side.

A further development is shown in FIG. 5, in which an angular orientation between the receiving direction EMR and the generating direction EZR is shown.

Two possibilities for the introduction of an excitation signal ES are shown schematically in FIGS. A constant introduction of the excitation signal ES over time, preferably with a constant frequency and/or constant amplitude, is preferred. However, it can also bring advantages in operational situations if the excitation signal ES is generated in a pulsed manner in accordance with FIG. A pulsed excitation can be useful, for example, if a differentiation from ambient noise or background noise is desired. The above explanation describes the present invention solely within the framework of examples.

reference list

10 detection device

20 basic bodies

22 mounting interface

24 opening

30 means of production

40 receiving means

50 evaluation unit

100 wind instrument

110 instrument cavity

120 instrument opening

130 instrument bodies

132 counter-mounting interface

134 counter-opening

140 mouthpiece

142 Blowing Section

144 resonance section

146 injection port

148 outlet port

149 blow-in microphone

150 sensor means

200 fingers

GP gripping position

ES excitation signal

RS resonance signal

GS grab position signal

EZR generation direction

EMR receiving direction

Claims

patent claims

1 . Detection device (10) for detecting different gripping positions (GP) on a wind instrument (100) with an instrument cavity (110) with closable instrument openings (120), having a base body (20) with a fastening interface (22) with an opening (24) for attachment to a mating attachment interface (132) having a mating port (134) of the wind instrument (100) for fluidly communicating communication between the port (24) and the mating port (134), further comprising generating means (30) for generating an excitation signal (ES) and for sending the excitation signal (ES) via the opening (24) of the attachment interface (22) into the instrument cavity (110) and receiving means (40) for receiving a resonance signal (RS) of the wind instrument (100) from the Instrument cavity (110) via the opening (24), which has been at least partially excited by the excitation signal (ES), further comprising an evaluation unit eit (50) for evaluating the resonance signal (RS) with regard to different gripping positions (GP) on the wind instrument (100) and for outputting a gripping position signal (GS) on the basis of a detected gripping position (GP).

2. Detection device (10) according to Claim 1, characterized in that the base body (20) is designed as a mouthpiece (140) for the wind instrument (100) with a blow-in section (142) and a resonance section (144), the resonance section (144 ) has at least the generating means (30) and the receiving means (40) and is acoustically and/or fluid-tightly separated from the injection section (142).

Detection device (10) according to Claim 2, characterized in that the injection section (142) has an injection opening (146) for introducing an injection air flow, the injection section (142) having at least one sensor means (150) for detecting at least one injection parameter , specifically any of the following:

- Injection angle

- blowing speed

- injection pressure

- Blowing amount detection device (10) according to any one of claims 2 or 3, characterized in that the blowing section (142) has an outlet opening (148) for the outlet of a blowing air flow from the blowing section (142). A detection device (10) according to any one of claims 2 to 4, characterized in that the blowing section (142) has a blowing microphone (149) for picking up a blowing noise. Detection device (10) according to one of the preceding claims, characterized in that the generating means (30) has a generating loudspeaker for generating an acoustic signal as an excitation signal (ES) and the receiving means (40) has a receiving microphone for receiving the resonance signal (RS) as an acoustic signal having. Detection device (10) according to one of the preceding claims, characterized in that the generating means (30) has a generating direction (EZR) for emitting the excitation signal (ES) which is directed past a receiving direction (EMR) of the receiving means (40). Wind instrument (100) with an instrument cavity (110) with closable instrument openings (120), further having a detection device (10) with the features of one of Claims 1 to 7, in particular in the form of a mouthpiece (140). Detection method for detecting different gripping positions (GP) on a wind instrument (100) by means of a detection device (10) having the features of one of Claims 1 to 7, having the following steps:

- generating an excitation signal (ES),

- introducing the generated excitation signal (ES) into an instrument cavity (110) of the wind instrument (100),

- detecting at least one resonance signal (RS) generated at least partially by the excitation signal (ES) from the instrument cavity (110),

- Evaluation of the resonance signal (RS) with regard to different gripping positions (GP) on the wind instrument (100),

- Outputting a gripping position signal (GS) based on the detected gripping position (GP). Detection method according to Claim 9, characterized in that the excitation signal (ES) is generated continuously or substantially continuously over a generation period. Detection method according to one of Claims 9 to 10, characterized in that the excitation signal (ES) is generated over a generation period with a constant or essentially constant frequency and/or constant or essentially constant amplitude. Detection method according to one of Claims 9 to 11, characterized in that at least one of the following parameters is taken into account when evaluating the resonance signal (RS):

- Overtones

Attenuation of the overtones

presence of a natural frequency 22 detection method according to one of claims 9 to 12, characterized in that an artificial intelligence is used for the evaluation of the resonance signal (RS). Detection method according to one of Claims 9 to 13, characterized in that the gripping position signal (GS) has identification information for identifying an incorrect gripping position (GP) and/or correction information for correcting an incorrect gripping position (GP). Detection method according to one of Claims 9 to 14, characterized in that a tone is generated digitally on the basis of the gripping position signal (GS) and in particular additionally on the basis of at least one blow-in parameter. Computer program product, comprising instructions which, when executed on a computer, cause this to carry out the steps of a recognition method having the features of one of claims 9 to 15.