نتایج جستجو برای: mems microphone
تعداد نتایج: 18404 فیلتر نتایج به سال:
In this paper, a MEMS microphone array system scheme is proposed which implements real-time direction of arrival (DOA) estimation for moving vehicles. Wind noise is the primary source of unwanted noise on microphones outdoors. A multiple signal classification (MUSIC) algorithm is used in this paper for direction finding associated with spatial coherence to discriminate between the wind noise an...
This paper addresses an economical, supple, continuous monitoring system of underground mine workers’ protection and security. A module of MEMS based sensors are used for monitoring underground parameters as per the requirement of the user and automating sequence of measuring data through digital wireless communication system is projected with high precision, soft control and reliability. A mic...
This paper deals with a frontend part of the readout circuit developed as an integrated circuit that after bonding together with a MEMS capacitive microphone (MCM) chip will be used in a noise dosimeter applicable in very noisy and harsh environment, e.g. mine. Therefore, the main attention has been paid to the high dynamic range, low offset and low noise of the developed readout interface as w...
A new methodology for the development of miniature photoacoustic trace gas sensors using 3D printing is presented. A near-infrared distributed feedback (DFB) laser is used together with a polymer-based gas cell, off-the-shelf fiber optic collimators, and a microelectromechanical system (MEMS) microphone to measure acetylene at 1532.83 nm. The resonance behavior of the miniature gas cell is anal...
This paper presents a hardware and software framework for reliable fall detection in the home environment, with particular focus on the protection and assistance to the elderly. The integrated prototype includes three different sensors: a 3D Time-Of-Flight range camera, a wearable MEMS accelerometer and a microphone. These devices are connected with custom interface circuits to a central PC tha...
چکیده ژیروسکوپ های mems ساختار پیوسته، همانند ژیروسکوپ های mems جرم متمرکز برمبنای نیروی کوریولیس عمل می کنند. در این مقاله ژیروسکوپ های ارتعاشی mems با رزناتور حلقوی مورد بررسی قرار گرفته اند. تا کنون اشکال متفاوت دایروی و ستاره ای 8 پر برای رزوناتور این ژیروسکوپ ها پیشنهاد شده است. در مقاله حاضر این مدل ها در نرم افزار abaqus تحلیل و مدل جدید ستاره ای 16 پر پیشنهاد شده است. همچنین، دینامیک ژی...
The need for small directional microphones is patent in the current market. From smartphones to hearing aids, a microphone capable of rejecting ambient noise highly desirable. Most MEMS are omnidirectional and have resort arrays achieve directionality, effectively counteracting reduced size that they offer first place. For this reason, we use bio-inspiration turn nature find examples solutions ...
Introduction: Nominal noise reduction rate of the earmuff manufacturers can be different compared with the actual attenuation rate. The present study aimed to determine the actual noise reduction rate of common hearing protection devices using microphone in real ear method. Materials and Methods: In this study, five brands of common earmuffs used in Iranian industries were investigated on 30...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید