H04R 2217/03
Parametric transducers where sound is generated or captured by the acoustic demodulation
Official title: Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
H04R2217/03 (Parametric transducers where sound is generated or captured by the acoustic demodulation) appears on 396 US grants and 495 published applications in this corpus.
Search patents in H04R- Granted patents
- 396
- Published applications
- 495
- Assignees
- 178
- Inventors
- 687
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 2 |
| 2002 | 4 | 4 |
| 2003 | 4 | 7 |
| 2004 | 2 | 8 |
| 2005 | 2 | 19 |
| 2006 | 2 | 10 |
| 2007 | 8 | 20 |
| 2008 | 6 | 8 |
| 2009 | 6 | 3 |
| 2010 | 9 | 4 |
| 2011 | 10 | 6 |
| 2012 | 9 | 11 |
| 2013 | 4 | 28 |
| 2014 | 17 | 34 |
| 2015 | 27 | 35 |
| 2016 | 36 | 35 |
| 2017 | 32 | 15 |
| 2018 | 20 | 18 |
| 2019 | 22 | 30 |
| 2020 | 31 | 29 |
| 2021 | 27 | 27 |
| 2022 | 24 | 38 |
| 2023 | 27 | 29 |
| 2024 | 19 | 21 |
| 2025 | 21 | 25 |
| 2026 | 16 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for generating an audio signal6 Oct 2026US 12,756,970 B2Sonicedge Ltd.
- Systems and methods for providing augmented ultrasonic audio11 Aug 2026US 12,707,218 B2Bose Corporation
- Ultrasonic transducer and parametric speaker including the same4 Aug 2026US 12,701,366 B2Murata Manufacturing Co., Ltd.
- Continuous rail and airborne rail transit alert system for pedestrians, vehicles and animals28 Jul 2026US 12,691,820 B1The Fred M. Kemp Foundation
- Acoustic feature computing apparatus, acoustic feature computing method, and program23 Jun 2026US 12,666,206 B2NTT, Inc.
- Safe Case for Ultrasonic Voice Masking13 Aug 2026US 2026/0237371 A1Ppip, LLC
- Air-Pulse Generating Device and Driving Circuit with Anti-Fatigue Asymmetric Initial Deflection13 Aug 2026US 2026/0238930 A1xMEMS Labs, Inc.
- Acoustic system, acoustic system control method, and acoustic system manufacturing method23 Jul 2026US 2026/0214384 A1Panasonic Automotive Systems Co., Ltd.
- Driving Circuit and Air-Pulse Generating System with Asymmetric Initial Deflection16 Jul 2026US 2026/0205740 A1xMEMS Labs, Inc.
- Air-Pulse Generating Device with Asymmetric Initial Deflection16 Jul 2026US 2026/0205741 A1xMEMS Labs, Inc.
Most cited
By later US patents
- Parametric array for a head-mountable device319US 8,750,541 B1Google Inc. · 2014
- Lighted enhanced bullhorn109US 5,859,915 AAmerican Technology Corporation · 1999
- Directional loudspeaker system95US 4,823,908 AMatsushita Electric Industrial Co., Ltd. · 1989
- Acoustic heterodyne device and method93US 5,889,870 AAmerican Technology Corporation · 1999
- Method and device for developing a virtual speaker distant from the sound source87US 6,229,899 B1American Technology Corporation · 2001