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1. (WO2018226866) SPECTRAL OPTIMIZATION OF AUDIO MASKING WAVEFORMS
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Pub. No.: WO/2018/226866 International Application No.: PCT/US2018/036313
Publication Date: 13.12.2018 International Filing Date: 06.06.2018
IPC:
G10K 11/175 (2006.01) ,H04R 3/00 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175
using interference effects; Masking sound
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
3
Circuits for transducers
Applicants:
BOSE CORPORATION [US/US]; The Mountain, MS 3B1 Framingham, Massachusetts 01701-9168, US
Inventors:
LEE, Daniel K.; US
GAUGER, Daniel M. Jr.; US
WAX, Aric J.; US
Agent:
HILL, Misha K.; US
Priority Data:
15/616,41107.06.2017US
Title (EN) SPECTRAL OPTIMIZATION OF AUDIO MASKING WAVEFORMS
(FR) OPTIMISATION SPECTRALE DE FORMES D'ONDES DE MASQUAGE AUDIO
Abstract:
(EN) A system for masking audio signals includes a microphone for generating an ambient audio signal representing ambient noise, a speaker for rendering masking audio, and a processor in communication with the microphone and the speaker. The processor performs spectral analysis on the ambient audio signal from the microphone to determine a spectral envelope of the ambient noise, adjusts a frequency response of an optimizing filter based on the spectral envelope, applies the optimizing filter to a baseline masking waveform, producing an output waveform with relative spectral distribution matching the ambient noise, and provides the output waveform to the speaker.
(FR) La présente invention concerne un système de masquage de signaux audio comprenant un microphone pour générer un signal audio ambiant représentant le bruit ambiant, un haut-parleur pour rendre le signal audio de masquage, et un processeur en communication avec le microphone et le haut-parleur. Le processeur effectue une analyse spectrale sur le signal audio ambiant provenant du microphone pour déterminer une enveloppe spectrale du bruit ambiant, ajuste une réponse en fréquence d'un filtre d'optimisation sur la base de l'enveloppe spectrale, applique le filtre d'optimisation à une forme d'onde de masquage de base, produisant une forme d'onde de sortie présentant une distribution spectrale relative correspondant au bruit ambiant, et fournit la forme d'onde de sortie au haut-parleur.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)