Localization of Acoustic Reflective Boundary Using a Pair of Microphones and an Arbitrary Sound Source

Zempo, Keiichi; Mizutani, Koichi; Wakatsuki, Naoto

doi:10.7567/jjap.52.07hg06

Cited by 8 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[513][514][515][516][517][518][519][520][521][522] Underwater positioning is a technique to determine the positions of vehicles underwater by measuring distances and directions, and experimental results and the improvement of accuracy by utilizing signal processing techniques (e.g., the use of reflected signals) have been reported. 501,[523][524][525][526][527][528] To support these applications, underwater acoustic transducers are necessary. Many electroacoustic transducers are designed to operate at the resonance frequency.…”

Section: Biomedical Ultrasoundmentioning

confidence: 99%

“…Propagation [449][450][451][452][453][454][455][456][457][458][459][460][461][462][463][464][465][466][467][468] Noise [473][474][475][476][477][478][479] Seafloor=sediment [469][470][471][472] Transducers [529][530][531][532] Positioning=ranging 501,[523][524][525][526][527][528] Acoustic imaging Imaging systems [483][484][485][486] Lenses [487][488][489][490][491]...…”

Section: Underwater Measurementmentioning

confidence: 99%

See 1 more Smart Citation

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Measurementthe act of measuring physical properties that we performhas the potential to contribute to the successful advancement of sciences and society. To open doors in physics and other sciences, various measurement methods and related applications have been developed, and ultrasound has remained a useful probe, power source, and interesting measurement object for the past two centuries. In this paper, we first summarize the basic principles of ultrasound from the viewpoint of measurement techniques for readers who just have started studying or are interested in the field of ultrasonic electronics. Moreover, we also introduce recent studiesultrasonic properties of materials, measurement techniques, piezoelectric devices, nonlinear acoustics, biomedical ultrasound, and ocean acousticsand their trends related to measurement techniques in ultrasonic electronics to provide some ideas for related applications.

show abstract

Section: Biomedical Ultrasoundmentioning

confidence: 99%

Section: Underwater Measurementmentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…We have proposed a self-localization method using only a few number of microphones and conducted simulation to examine it [18,19]. This is based on the techniques using microphone array consists of small element number [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Self-localization method for mobile robot using acoustic beacons

et al. 2015

Self Cite

View full text Add to dashboard Cite

In this paper, we have proposed a low-cost self-localization method which uses 4 elements of microphones, wheel rotation and sound sources as beacons, whose absolute location and frequency bands are known. The proposed method consists of following 4 steps. The proposed method (i) execute self-localization using wheel-based odometry, (ii) estimate direction-of-arrival (DOA) of the sound sources using sounds recorded by the elements of the microphone array, (iii) predict the DOA of the sound sources from estimated location and pose, and (iv) conduct self-localization by integrating all of the information. To evaluate the proposed method, experiments were conducted. The proposed method was compared to the conventional methods, which were wheel-based odometry and self-localization using only DOA. In the experiments, we have supposed the house-cleaning robot and its trajectory. As results, without any obstacles or walls, the mean of the estimation errors by wheel-based odometry were 670 mm and 0.08 rad, and those of self-localization using only DOA were 2870 m and 0.07 rad in the worst case. In contrast with these methods, proposed method results in 69 mm, 0.02 rad as the worst estimation error of self location and pose. From the result with occlusion of a sound source, the mean of the localization error increased 60 mm, as the proposed method detects the incorrect DOA and prevents it from estimation. From the result with reflective wave from wall, there was a place where the localization error was large. The cause of this error was considered as directivity of sound source. These results indicate that the proposed method is feasible under indoor environment.

show abstract

“…1) The most common approach for passive source localization is to use time delays between pairs of hydrophones to define curves of constant time difference. [3][4][5][6][7] Other applicable techniques include the use of line or surface array hydrophones, wherein beam forming and wave front curvature ranging may be employed. 8) However, because these systems require a large number of hydrophones, the calculation process becomes so complex that the computational time increases markedly.…”

Section: Introductionmentioning

confidence: 99%

Design and fabrication of a multimode ring vector hydrophone

Lim

Joh

Seo

et al. 2014

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Typical underwater acoustic sensors can measure the magnitude of an incoming sound wave but cannot identify the direction. In this paper, a new simple method for detecting the direction of a sound wave with a piezoelectric ring hydrophone is proposed. This method divides the piezoceramic ring of the hydrophone into eight elements and distinguishes the direction of the sound wave by combining the output voltages of the elements in a particular manner. The validity of the design method was confirmed through the fabrication of an experimental prototype of the ring hydrophone with the proposed structure and a comparison of its performance with the design results. The method allows the ring vector hydrophone to operate over a very wide frequency range without being restricted to its structural resonant frequencies.

show abstract

Localization of Acoustic Reflective Boundary Using a Pair of Microphones and an Arbitrary Sound Source

Cited by 8 publications

References 24 publications

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Self-localization method for mobile robot using acoustic beacons

Design and fabrication of a multimode ring vector hydrophone

Contact Info

Product

Resources

About