Patent AU-2019422007-B2 (AU)
Title: An electrical device for reducing noise
Inventor: HAM FREDERICK NICOLAAS
IPC: H04M1/19
Filed: 2019-10-24
Granted: 2021-06-24
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
(1) Organization11111111111111111111111I1111111111111i1111liiiii 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2021/077150 Al 
29 April 2021 (29.04.2021) W IPO I PCT 
(51) InternationalPatent Classification: (74) Agent: BAXTER PATENT ATTORNEYS PTY LTD; 
H04M1/19 (2006.01) G1OL 21/0208 (2013.01) Suite 2, Level 3A, 1 Bligh St., Sydney, New South Wales 
(21) International Application Number: 2000 (AU).  
PCT/AU2019/051166 (81) Designated States (unless otherwise indicated, for every 
(22) International Filing Date: kind ofnational protection available): AE, AG, AL, AM, 
24 October 2019 (24.10.2019) 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, 
(25) Filing Language: English 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, 
(26)PublicationKLanguage: English R, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
(71) Applicant: DARK REIGN INDUSTRIES PTY LTD MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 
[AU/AU]; 4 Batten Place, Doonside, New South Wales OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
2767 (AU). SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 
(72) Inventors: HAM, Frederick Nicolaas; 4 Batten Place, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.  
Doonside, New South Wales 2767 (AU). RYAN, Andrew (84) Designated States (unless otherwise indicated, for every 
John; 4 Batten Place, Doonside, New South Wales 2767 kind of regional protection available): ARIPO (BW, GH, 
(AU). GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
(54) Title: AN ELECTRICAL DEVICE FOR REDUCING NOISE 
100 Figure 1 
output signal 
first second 
ectrical electrical 
110 ... 12 - ) 
sound source 
(57) Abstract: An electrical device for reducing noise, comprises a first microphone (110) configured to receive soundwave from a 
sound source and convert the soundwave to a first electrical signal including a noise component, a second microphone (112) configured 
t-- to receive ambient noise from an ambient environment and convert the ambient noise to a second electrical signal. The second electrical 
signal is reversed in polarity to the first electrical signal. The electrical device further comprises a circuit (113) connecting the first 
microphone (110) and the second microphone (112). The circuit (113) is configured to combine the first electrical signal and the second 
C electrical signal in order to reduce the noise component in the first electrical signal with the second electrical signal that is reversed 
in polarity.
W O 202 1/077 150 A 1 ||11||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 
TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
EE, ES, Fl, 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), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 
KM, ML, MR, NE, SN, TD, TG).  
Published: 
- with international search report (Art. 21(3))