EP2700069A1 - Generation d'un son de machine tournante d'un appareil - Google Patents
Generation d'un son de machine tournante d'un appareilInfo
- Publication number
- EP2700069A1 EP2700069A1 EP12712119.2A EP12712119A EP2700069A1 EP 2700069 A1 EP2700069 A1 EP 2700069A1 EP 12712119 A EP12712119 A EP 12712119A EP 2700069 A1 EP2700069 A1 EP 2700069A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotating machine
- generating
- sound
- sound according
- values
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/02—Synthesis of acoustic waves
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
- G10H7/08—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform
- G10H7/10—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/131—Mathematical functions for musical analysis, processing, synthesis or composition
- G10H2250/211—Random number generators, pseudorandom generators, classes of functions therefor
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
- G10H2250/315—Sound category-dependent sound synthesis processes [Gensound] for musical use; Sound category-specific synthesis-controlling parameters or control means therefor
- G10H2250/371—Gensound equipment, i.e. synthesizing sounds produced by man-made devices, e.g. machines
- G10H2250/381—Road, i.e. sounds which are part of a road, street or urban traffic soundscape, e.g. automobiles, bikes, trucks, traffic, vehicle horns, collisions
Definitions
- the invention relates to a method for generating a sound of a rotating machine, such as the motor of a motor vehicle, a train, a helicopter, etc., and a method for generating a engine sound within a device like a motor vehicle. It also relates to a sound device generating a motor sound of a motor vehicle using such a method. Finally, it also relates to a motor vehicle equipped with such a sound device.
- the document FR2924260 proposes a solution for generating a synthetic sound inside the motor vehicle taking into account the engine speed and the position of the accelerator pedal. This synthesis of sound consists of a classical method of decomposing the sound of the real engine into different harmonics.
- WO200225628 also describes a more complicated method of synthesizing a sound, which integrates a calculation of a phase associated with each harmonic of the sound, in order to seek a reproduction as realistic as possible real sounds.
- the calculations implemented are, however, complex and incompatible with real-time use in a motor vehicle.
- a solution for generating a synthetic sound of a rotating machine such as a motor vehicle engine to achieve a more realistic and / or enjoyable and consistent with a real-time generation, in a manner coordinated with the actual operation of a motor vehicle engine for example.
- the invention is based on a method of generating a rotating machine sound, comprising a step of determining the frequencies and amplitudes of n partials and / or harmonic relevant in the sound of a rotating machine, characterized in that it includes a step of determining values and a step of calculating a synthesized sound of the rotating machine, composed from n partial and / or harmonic but whose frequency is wholly or partly offset values.
- FIG. 1 represents an algorithm of the method of generating an engine sound according to one embodiment of the invention.
- FIGS. 2a and 2b show harmonic and / or partial arrays for respectively two different types of motor according to one embodiment of the invention.
- FIG. 3 represents a table of amplitude values in dB as a function of the harmonics and / or partial and of the engine speed according to one embodiment of the invention.
- FIG. 4 represents a table of values of a gain as a function of a driver's desire according to one embodiment of the invention.
- FIG. 5 represents a table of values of a gain as a function of the speed of the motor vehicle according to one embodiment of the invention.
- the invention is based on a method of generating a sound of a particular motor of a motor vehicle, an algorithm of which according to one embodiment is shown in FIG.
- the same method can be used for generating a sound of any rotating machine or sound of an imaginary machine, which does not actually exist. It can be the rotating machine of any device, such as a helicopter, a plane, a train, etc.
- the method first comprises an upstream phase, preparing parameters that will be used to generate the synthesis sound.
- This upstream phase comprises a first step E1 for determining a fundamental frequency f 0 (N) of the sound of the engine, then of n harmonics and / or partials i (h to i n ) of the sound of this engine considered.
- the sound of the motor is represented by this fundamental frequency fo (N), which generally depends on its operating speed N, that is to say on the rotation frequency of the crankshaft for a motor vehicle engine, then by the frequencies ix fo (N), for all selected harmonic and / or partial values i.
- i is an integer
- we speaks of harmonic while in other cases, it is a partial. For example, for a four-stroke engine, all selected partials are half-integers.
- this step E1 makes it possible to define the frequencies of n harmonic and / or partial relevant in the sound of the machine in question.
- FIGS. 2a and 2b illustrate memorized harmonic and partial solutions for respectively a six-cylinder and four-cylinder engine.
- several solutions can be provided for the same engine, according to different desired renderings.
- the table of FIG. 3 represents a more complete choice for a six-cylinder engine.
- the method comprises a second step E2 generating n any number ai, advantageously between [-0.2; 0,2]. Since these numbers may be arbitrary, they are defined for example by a random generation. However, any other method to define them may be appropriate since they are arbitrary.
- the values of ai between [-0.1; 0.1].
- n values ai may be chosen less than n values ai.
- the method comprises a third step E3 of determining a data table of reference values of an amplitude k (i, N * ) in dB as a function of the harmonics and / or partial determined in the first step and in function certain selected values of engine speed N * .
- this third step is performed empirically, by recording the actual noise of the engine and then decomposition.
- this third step is carried out by a simple expertise, according to artistic criteria.
- the method then comprises a fourth step E4 for determining a data table representing a gain Gi in dB, to take into account the intervention of the driver on the engine.
- a data table representing a gain Gi in dB to take into account the intervention of the driver on the engine.
- it takes into account the position of the accelerator pedal, which represents an important desire of the driver in terms of the operation of the vehicle.
- gain values G1 as a function of certain predefined values C * representing an action of a conductor are predefined and stored, as illustrated by way of example in the table of FIG. 4.
- the method then comprises a fifth step E5 of determining a data table representing a second gain G2 in dB as a function of predefined speed values V * of the motor vehicle.
- the table presented in FIG. 5 presents the values retained for this gain as a function of V * , according to this embodiment. This gain reduces the volume of the sound when the speed increases, to reach a comfortable situation at high speed on the highway for example.
- the method comprises a sixth step E6 of recording the values thus obtained in a memory. These stored data are represented by way of example in the table of FIG. 3.
- the method implements an iterative phase, which changes with time.
- the values defined previously during the upstream phase then remain always constant, and the process is limited to the second iterative phase. Alternatively, it may be chosen to modify these values according to defined criteria.
- this step therefore integrates the measurement or estimation of a regime N of the engine at time t.
- the amplitude value k (i, N) is obtained by extrapolation of the predefined values during the upstream phase and stored in the data table.
- the frequency of each harmonic and / or partial i is slightly shifted by a random value, that is to say in the sense of any value.
- This calculation of the frequencies taken into account in this calculation of the sound makes it possible to arrive at a more realistic sound, without increasing the complexity of the computation, which is compatible with an implementation by modest computing devices while allowing a calculation in time. real.
- equation (1) is replaced by the following equation (2), in which a phase ⁇ ( ⁇ ) is added for each harmonic and / or partial, these phases ⁇ ( ⁇ ) being in advance calculated once and for all in any way, for example randomly, in the range] 0; 2 ⁇ [.
- N / 60 represents the engine speed in rev / s.
- the two gain values Gi (C) and G2 /) are obtained by extrapolation of the values stored in the tables of values defined during the upstream phase.
- Steps E7 and E8 are repeated in time, according to a certain time step dt predefined.
- the method comprises a step E9 for broadcasting the calculated sound.
- the sound generation method described above can naturally undergo variations without departing from the scope of the invention.
- the use of gains G 1 and / or G 2 remains optional.
- the amplitude values k (i, N) can be defined differently.
- the method described above is implemented in a sound generation device of an engine, comprising at least one computer, which implements the steps of the method described above and which is connected to a sound diffusion device, which comprises an amplifier coupled to one or more speakers.
- the computer is further connected to a memory, comprising the various data mentioned above, useful for the implementation of the method.
- the sound generation method of a motor vehicle engine can be implemented in different applications.
- the engine sound generation device is advantageously connected to a communication network on board the motor vehicle, by which it retrieves the values of the data representative of the engine speed, the position of the accelerator pedal, the vehicle speed, and possibly any vehicle actuator or other driver control and / or other quantities representative of the condition or operation of the vehicle, such as hybrid, thermal, electrical, LPG, etc., the motorization of the vehicle and / or the torque experienced by the engine to deal with deceleration, etc.
- the sound diffuser can be connected to the onboard speakers of the vehicle, also provided for broadcasting radio for example.
- the engine generating device is adapted to emit an engine sound inside the cabin, perfectly correlated with the real sound of the engine.
- the steps E7 and E8 are repeated very quickly, in a very small time step, so as to better follow the engine variations, to obtain a synthesis sound correlated best with the actual operation of the engine.
- These steps E7, E8 use a measurement of the engine speed N transmitted periodically to the calculator of the sound generator for the application of equations (1) or (2) of step E7.
- this transmitted value of the engine speed N can be modified by the computer, according to an interpolation of the last values retained, in order to obtain a value of the engine speed varying according to a smaller period, in order to better follow the variations of the engine.
- the same approach applies to other data taken into account, such as the position of the accelerator pedal.
- the device for generating its engine is used in a motor vehicle simulator, so as to reproduce the sound of a motor as realistic as possible.
- the engine generating device is used to simply create a sound file from data from a predefined driving profile of a motor vehicle, including data of the engine speed, the support on the accelerator pedal, etc. In the latter case, the application of the principle of sound generation is no longer in a real-time constraint.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1153377A FR2974441B1 (fr) | 2011-04-19 | 2011-04-19 | Generation d'un son de machine tournante d'un appareil |
| PCT/EP2012/056195 WO2012143244A1 (fr) | 2011-04-19 | 2012-04-04 | Generation d'un son de machine tournante d'un appareil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2700069A1 true EP2700069A1 (fr) | 2014-02-26 |
| EP2700069B1 EP2700069B1 (fr) | 2017-03-08 |
Family
ID=45929528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12712119.2A Active EP2700069B1 (fr) | 2011-04-19 | 2012-04-04 | Generation d'un son de machine tournante d'un appareil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9542925B2 (fr) |
| EP (1) | EP2700069B1 (fr) |
| CN (1) | CN103907150B (fr) |
| FR (1) | FR2974441B1 (fr) |
| WO (1) | WO2012143244A1 (fr) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9031248B2 (en) * | 2013-01-18 | 2015-05-12 | Bose Corporation | Vehicle engine sound extraction and reproduction |
| US9959852B2 (en) | 2013-01-18 | 2018-05-01 | Bose Corporation | Vehicle engine sound extraction |
| DE102013202890B4 (de) | 2013-02-22 | 2018-12-06 | Schaeffler Technologies AG & Co. KG | Verfahren zur Erzeugung eines Audiosignal für ein synthetisches Geräusch eines Kraftfahrzeuges |
| US9495953B2 (en) | 2014-06-10 | 2016-11-15 | Bose Corporation | Dynamic engine harmonic enhancement sound stage |
| FR3026218B1 (fr) * | 2014-09-18 | 2016-10-28 | Peugeot Citroen Automobiles Sa | Dispositif de synthese sonore destine a la coloration active du bruit d'un moteur de vehicule |
| CN108032800B (zh) * | 2017-12-06 | 2020-11-20 | 滁州松泽电器有限公司 | 声音的合成方法、装置及电子设备 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4631747A (en) * | 1978-07-17 | 1986-12-23 | Raytheon Company | Digital sound synthesizer |
| DE19945259C1 (de) * | 1999-09-21 | 2001-01-11 | Bayerische Motoren Werke Ag | Vorrichtung zur elektroakustischen Geräuscherzeugung bei einem Kraftfahrzeug |
| WO2002025628A1 (fr) * | 2000-09-25 | 2002-03-28 | Onda Edit S.L. | Système de synthèse par harmoniques et formants |
| JP4888386B2 (ja) * | 2005-03-11 | 2012-02-29 | ヤマハ株式会社 | エンジン音加工装置 |
| JP4173891B2 (ja) * | 2005-03-22 | 2008-10-29 | 本田技研工業株式会社 | 移動体用効果音発生装置 |
| JP4341608B2 (ja) * | 2005-11-01 | 2009-10-07 | トヨタ自動車株式会社 | エンジン音制御装置 |
| JP5040541B2 (ja) * | 2007-09-10 | 2012-10-03 | ヤマハ株式会社 | エンジン音合成装置 |
| FR2924260B1 (fr) * | 2007-11-26 | 2011-04-08 | Peugeot Citroen Automobiles Sa | Dispositif de coloration en temps reel du bruit d'un moteur de vehicule |
| JP5391989B2 (ja) | 2009-10-13 | 2014-01-15 | ヤマハ株式会社 | エンジン音生成装置 |
-
2011
- 2011-04-19 FR FR1153377A patent/FR2974441B1/fr active Active
-
2012
- 2012-04-04 US US14/113,033 patent/US9542925B2/en active Active
- 2012-04-04 CN CN201280027317.3A patent/CN103907150B/zh active Active
- 2012-04-04 WO PCT/EP2012/056195 patent/WO2012143244A1/fr not_active Ceased
- 2012-04-04 EP EP12712119.2A patent/EP2700069B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20140328498A1 (en) | 2014-11-06 |
| CN103907150B (zh) | 2017-05-17 |
| FR2974441A1 (fr) | 2012-10-26 |
| EP2700069B1 (fr) | 2017-03-08 |
| FR2974441B1 (fr) | 2014-09-12 |
| CN103907150A (zh) | 2014-07-02 |
| US9542925B2 (en) | 2017-01-10 |
| WO2012143244A1 (fr) | 2012-10-26 |
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