Generating sound for a rotating machine of a device
AssigneesRENAULT s.a.s., Genesis
InventorsNathalie Le-Hir, Gaël Guyader, Patrick Boussard, Benoît Gauduin, Florent Jaillet
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Abstract
The invention relates to a method for generating sound for a rotating machine, including a step (E1) of determining the frequencies and amplitudes of n partials and/or harmonics (i) pertaining to the sound of a rotating machine, characterized in that the method includes a step (E2) of determining values (a1) and a step (E7-E8) of calculating a synthetic sound for the rotating machine, said synthetic sound being composed from the n partials and/or harmonics (i), while the frequency thereof is entirely or partially shifted by the values (ai).
Claims14
A method for generating a rotating machine sound, comprising:
- a step (E1) of determining the frequencies and amplitudes of n relevant partials and/or harmonics (i) in the sonority of a rotating machine, comprising:
- a step (E2) of determining values (ai);
- and
- a step of calculating (E7-E8) a synthetic sound of the rotating machine, made up of the n partials and/or harmonics (i) but whose frequency is all or partly shifted by the values (ai);
- wherein the step of calculating a synthetic sound s(N,t) (E7) comprises a calculation defined by the equation:
- s
-
- (
- N
- ,
- t
- )
- =
- ∑
- i
- =
- i
-
-
- 1
- i
-
-
- n
-
- k
-
- (
- i
- ,
- N
- )
- ×
- sin
-
- [
- 2
- ×
- π
- ×
- t
- ×
- f
-
- (
- (
- i
- +
- a
-
-
- i
- )
- ,
- N
- )
- ]
- wherein N is the speed of the rotating machine, t the time, k(i, N) an amplitude in dB, f(i+ai) the frequency associated with the harmonic/partial (i) shifted by the value (ai).
A method for generating a rotating machine sound, comprising:
- a step (E1) of determining the frequencies and amplitudes of n relevant partials and/or harmonics (i) in the sonority of a rotating machine, comprising:
- a step (E2) of determining values (ai);
- and
- a step of calculating (E7-E8) a synthetic sound of the rotating machine, made up of the n partials and/or harmonics (i) but whose frequency is all or partly shifted by the values (ai);
- wherein the step of calculating a synthetic sound s(N,t) (E7) comprises a calculation defined by the equation:
- s
-
- (
- N
- ,
- t
- )
- =
- ∑
- i
- =
- i
-
-
- 1
- i
-
-
- n
-
- k
-
- (
- i
- ,
- N
- )
- ×
- sin
-
- [
- 2
- ×
- π
- ×
- t
- ×
- f
-
- (
- (
- i
- +
- a
-
-
- i
- )
- ,
- N
- )
- +
- Φ
-
- (
- i
- )
- ]
- wherein N is the speed of the rotating machine, t the time, k(i, N) an amplitude in dB, f(i+ai) the frequency associated with the harmonic/partial (i) shifted by the value (ai), φ(i) any phase associated with the harmonic/partial (i), as randomly chosen between [0;
- 2 π].
A method for generating a rotating machine sound, comprising:
- a step (E1) of determining the frequencies and amplitudes of n relevant partials and/or harmonics (i) in the sonority of a rotating machine, comprising:
- a step (E2) of determining values (ai);
- and
- a step of calculating (E7-E8) a synthetic sound of the rotating machine, made up of the n partials and/or harmonics (i) but whose frequency is all or partly shifted by the values (ai);
- wherein the frequency f((i+ai), N) of each harmonic and/or partial (i) is defined by the equation f((i+ai), N)=(N/60)×(i+ai), in which N/60 represents the speed of the rotating machine in revolution/s.
Dependencies are inferred from the claim text.