Sound Camera Introduction
81Pages

SeeSV-S205 Portable Sound Camera Product Overview and Specifications SM Instruments Inc.

• Product Overview

Product Overview

What is the Portable Sound Camera? • Optical Camera + Microphone Array Optical Camera

What is the Portable Sound Camera? • Example: Sound video of an engine

What is the Portable Sound Camera? • Example: Sound video of a printer

Market Needs • Now we have quiet cars, and we are ready to hear many kind of annoying transient noises which had been masked by loud background noises.

What annoys you in your car? Buzz BSR : Buzz, Squeak and Rattle

Buzz, Squeak and Rattle (BSR) • Many industries, including automotive one, focus on buzz, squeak and rattle to improve subject quality of their products.

Customer Feedback • Statistics shows that BSR is important issues. E (1%) Recent 5 years average

What type of tools for BSR? • Procedure to treat BSR Identify Noise Sources Understand Mechanism Apply Solution Efficient tools are required to make whole procedure efficient

• Source identification is the most important process in squeak and rattle noise reduction efforts. Transient, high freq Quantify levels BSR: Buzz, Squeak and Rattle

Available Tools in Market

It should be portable and able to detect high frequency transient noise.

Development Target • Market request is to develop a portable sound camera. Reducing Size, Weight and Cables. Increasing Processing Speed.

Development History • • • • • • • Rectangular array has been tested PXI-Based spiral array has been released High speed train test has been carried out cDAQ-based spiral array has been released Panoramic array has been Released MEMS microphone based prototype has been developed SeeSV-S205 Released cDAQ System cRIO System

MEMS Microphones and NI-sbRIO • MEMS(Micro-Electric Mechanical System) Microphones and Nl sbRIO were used to reduce the size and weight. Microphone + AD Converter 50 DIOs, FPGA and RT

PCB Based Microphone Array • We printed wires on a PCB and placed MEMS microphones and sb-RIO.

Reducing Array Size • Small array gives better mobility!

Spatial Resolution • At high frequency range, small size array still has reasonable spatial resolution. (Resolution) ∝ (Diameter of Array) x (Frequency of Sound

Working With Professional Designers • Working with Industrial Designers at a University.

reddot design award winner 2013 • The Portable Sound Camera won the reddot design award winner 2013, which is the World Most Famous Design Contest.

High Speed Scanning by FPGA Processing • Scanning in 2D-plane by beamforming method gives a sound images. 1

FPGA Enables Parallel Processing Contents Contents FPGA FPGA Method Method Serial Calculation Serial Calculation Parallel Calculation Parallel Calculation Data Type Data Type Double Precision Double Precision Fixed Point Fixed Point Beamforming Beamforming Method Method FFT-Based FFT-Based Beamforming Beamforming Time Domain Time Domain Beamforming Beamforming Frame Rate Frame Rate Frequency Range Frequency Range 10 individual freq. 10 individual freq. Whole freq. band Whole freq. band Hardware Hardware High Performance PC Embedded Hardware High Performance PC Embedded Hardware

High Speed Processing • BSR mainly consists of highly transient noise. FPGA Technology

imple, Easy but Powerful Software The real-time software is designed for a non- professional people. Software Mode Image Display RePlaV Converting to Video Clip - Time Signal Power Spectrum ndstop n W Band Stop Level Trend Signal Graphs Image Threshold Image Range Image Average Band Pass Filter Graph Selector Device Status

Frequency Band Adjustment • For example, you can filter out unwanted noise.

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Portable Sound Camera on the Media GEAR SCIENCE ENTERTAINMENT BUSINESS SECURITY DESIGN OPINION VIDEO INSIDER MAGAZINE SUBSCRIBE Pinpoint Your Car's Troubling Rattle With a 'Sound Camera' n problem encountered by shade-tree mechanics You car but you can't figure out where it's coming from. Thai's where a sound ci Einstein's Fridge, Dewafs Flask, MOST RECENT WIRED POSTS Mars Crater York City Their Words] Login/Register Newsletter i Subscribe I GADGETS CARS SCIENCE 0 TECHNOLOGY 0 DIYO GALLERIES III VIDEOS III COLUMNS O This Sound Camera Could Help You Meaning it can see where exactly where...

Portable Sound Camera on

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SeeSV-S205’s Portable Design • Small array gives better mobility preserving reasonable resolution at high frequency.

Spatial Resolution BSR has normally 10-50 times higher frequency range compared to normal engine noise. (Resolution) °^ (Diameter of Array) x (Frequency of Sound)

Spatial Resolution • Spatial resolution (Main lobe width) inversely proportional to the diameter of a microphone array.

Spatial Resolution • At high frequency range, small size array still has reasonable spatial resolution. (Resolution) ∝ (Diameter of Array) x (Frequency of Sound