Essays about: "microphone"

Showing result 1 - 5 of 127 essays containing the word microphone.

  1. 1. The use of and attitudes to voice amplification in higher education institutions

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Joshua David Ashok; [2020]
    Keywords : ;

    Abstract : Background: Voice is still the most important tool used by teachers, but voice is varied and subject to problems. Teachers who lecture for long hours or have taught for most of their professional lives, face issues such as voice discomfort, chronic voice disorders, occupational voice disorder, stress, physiological and psychological problems. READ MORE

  2. 2. Development of a demo platform on mobile devices for 2D- and 3D-sound processing

    University essay from Uppsala universitet/Elektricitetslära

    Author : Frans Rosencrantz; [2020]
    Keywords : Spatial Audio; Raspberry PI; Microphone Array; Dirac;

    Abstract : This thesis project aims for the development of a demonstration platform on mobile devices for testing and demonstrating algorithms for 2D and 3D spatial sound reproduction. The demo system consists of four omnidirectional microphones in a square planar array, an Octo sound card (from Audio Injector), a Raspberry Pi 3B+ (R-Pi) single-board computer and an inertial measurement unit (IMU) located in the center of the array. READ MORE

  3. 3. Raspberry Pi Based IoT System for Bats Detection at Wind Farms

    University essay from Blekinge Tekniska Högskola/Institutionen för matematik och naturvetenskap; Blekinge Tekniska Högskola/Institutionen för matematik och naturvetenskap

    Author : Hemanth Surya Karuturi; Megha Sanjeev Reddy Karri; [2020]
    Keywords : Bats; Pattern Recognition; Ultrasonic Frequencies; Ultrasonic Microphone; Ultrasonic Transducer; Wind Turbines;

    Abstract : Context: Large numbers of bats are killed by collisions with wind turbines and there is at present no accepted method of reducing or preventing this mortality. We designed a system, which detects and records any bats’ activity in and around the surroundings of wind turbines. READ MORE

  4. 4. Fault detection of planetary gearboxes in BLDC-motors using vibration and acoustic noise analysis

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Henrik Ahnesjö; [2020]
    Keywords : Planetary gearbox; Fault detection; Condition Monitoring; Support Vector Machine SVM ; Machine Learning; Supervised Machine Learning; Defect Pinion; Defect Planet Gear; MATLAB; LabVIEW; Soundproof-box; Noise Vibration Harshness NVH ; Gearmesh Frequency GMF ; Power Spectrum; BLDC-motor;

    Abstract : This thesis aims to use vibration and acoustic noise analysis to help a production line of a certain motor type to ensure good quality. Noise from the gearbox is sometimes present and the way it is detected is with a human listening to it. This type of error detection is subjective, and it is possible for human error to be present. READ MORE

  5. 5. Beamforming and Blind Signal Separation for Far-field Voice Capture using a Microphone Array

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Luke Postema; Johan Davidsson; [2019]
    Keywords : Beamforming; Microphone array; Minimum variance distortionless response; delay-and-sum; direction of arrival; blind signal separation; Technology and Engineering;

    Abstract : With the evolving technology of mobile electronics and other forms of communication methods, an increasing demand of speech intelligibility is introduced. In a conference room for example, multiple microphones are placed directly in front of the speaker in order to pick up clean speech. However, several challenges still exist. READ MORE