# US 12,603,077 B2 · Active sound generation device

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- Number: US 12,603,077 B2
- Document ID: US12603077B2
- Status: Granted
- Kind: B2
- Application number: 18/426,380
- Filed: 2024-01-30
- Published: 2024-08-15
- Granted: 2026-04-14
- Earliest claimed: 2023-02-10
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Xun Wang; Toshio Inoue
- Web page: https://patentgrep.com/patent/US12603077B2

## CPC

- G10K 15/04: Sound-producing devices (G10K15/02 takes precedence)
- B60Q 5/00: Arrangement or adaptation of acoustic signal devices
- G10K 15/02: Synthesis of acoustic waves (synthesis of speech G10L13/00)
- H04R 1/22: for obtaining desired frequency characteristic only {(circuit for combining transducers having different responses H04R3/00; for hearing aids H04R25/407)}
- H04R 3/12: for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)}
- H04R 2430/01: Aspects of volume control, not necessarily automatic, in sound systems
- H04R 2499/13: Acoustic transducers and sound field adaptation in vehicles
- 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
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

An active sound generation device is proposed to generate a sound effect in a vehicle interior. The active sound generation device includes: a low sampling rate generation part, generating a low sampling rate signal by lowering a sampling rate; a processing frequency setting part, setting the sampling rate of the low sampling rate generation part; a high sampling rate generation part, amplifying a sampling rate of the low sampling rate signal to generate a high sampling rate signal as the sound effect; and a speaker, outputting the sound effect.

## Claims

### Claim 1

An active sound generation device, configured to generate a sound effect in a vehicle interior, comprising:
a low sampling rate generation part, generating a low sampling rate signal by lowering a sampling rate;
a processing frequency setting part, setting the sampling rate of the low sampling rate generation part;
a high sampling rate generation part, amplifying the sampling rate of the low sampling rate signal to generate a high sampling rate signal as the sound effect; and
a speaker, outputting the sound effect, wherein
the vehicle comprises a vehicle information acquisition part, configured to obtain a vehicle speed of the vehicle and a rotation speed of a driving force generation device of the vehicle, and
the active sound generation device further comprises a sampling rate frequency table, configured to store the sampling rate corresponding to the vehicle speed or the rotation speed,
wherein the processing frequency setting part is configured to:
set the sampling rate according to the sampling rate frequency table and the vehicle speed or the rotation speed obtained by the vehicle information acquisition part; and
provide the sampling rate to the low sampling rate generation part and the high sampling rate generation part.

### Claim 2 (depends on 1)

The active sound generation device according to claim 1, further comprising:
a sound source generation part, generating a sound source signal different from the sound effect; and
a sound source synthesis part, synthesizing the sound source signal and the high sampling rate signal to generate a synthesized sound and output the synthesized sound through the speaker.

### Claim 3 (depends on 1)

The active sound generation device according to claim 1, wherein
the processing frequency setting part sets the sampling rate according to a highest frequency component of the sound effect.

### Claim 4 (depends on 1)

The active sound generation device according to claim 1, further comprising:
a sound effect pattern selection part, configured to provide a plurality of sound effect patterns that are different from a tone of the sound effect, wherein
the sound effect pattern selection part selects from the sound effect patterns according to a condition of the vehicle or an operation of an occupant.

### Claim 5 (depends on 1)

The active sound generation device according to claim 1, wherein
the high sampling rate generation part is further configured to determine an amplifying factor, based on the sampling rate provided from the processing frequency setting part, for amplifying the sampling rate of the low sampling rate signal.