Transcription of Introduction to Loudspeakers and ... - Purdue …
{{id}} {{{paragraph}}}
Example: confidence
Introduction to Loudspeakers and ... - Purdue …
Introduction to Loudspeakers and EnclosuresD. G. MeyerSchool of Electrical & Computer EngineeringOutline Background How Loudspeakers work Waveforms Wavelengths Speed of sound Speed of sound How sound propagates Sound pressure level (dB) Summation of audio signals Phase wheel Beamwidth 3D directivity balloons How Loudspeakers WorkHow Loudspeakers Are MadeThe WaveformTransmission = C/FC is speed of sound at of sound at ambient conditionsTransmissionHow Sound PropagatesAcoustic Decibel (dB SPL) In acoustics, the ratios most commonly encountered are changes in pressure level, measured in dB-SPL: As distance from a sound source doubles, the dB-SPL decreases 6 dB (this is called dB-SPL = 20 log10(p/po) where po= 20 N/m2the dB-SPL decreases 6 dB (this is called the inverse square law) Adding/subtracting dB levels: Doublingacoustic powercorresponds to a 3 dBincrease in SPL Doubling perceived loudnesscorresponds to a 10 dBincrease in SPLSPLa SPLb = 10 log10[ 10 db-SPLa/10 10db-SPLb/10]TransmissionTransmissionTra nsmissionTransmissionElectrica)
Introduction to Loudspeakers and Enclosures D. G. Meyer School of Electrical & Computer Engineering. Outline • Background – How loudspeakers work – Waveforms – Wavelengths – Speed of sound – How sound propagates – Sound pressure level (dB) – Summation of audio signals
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
Related search queries
Introduction, Engineering, Gamal Department of Electrical, Department of Electrical Engineering Stanford, Engineering Aspects of Electromagnetic Shielding, INTRODUCTION - dB Engineering, 598 Database Management Spring 2012, Database, Chapter 1: Introduction, Polymer, Polymer Chemistry Polymer, Licensed under a Creative Commons, Introduction to Database Concepts