Noise Aperiodic complex wave

Slides:

Advertisements

Similar presentations

Decibel values: sum and difference. Sound level summation in dB (1): Incoherent (energetic) sum of two different sounds: Lp 1 = 10 log (p 1 /p rif ) 2.

Advertisements

Frequency analysis.

Acoustic/Prosodic Features

1 / 13 Fourier, bandwidth, filter. 2 / 13 The important roles of Fourier series and Fourier transforms: –To analysis and synthesis signals in frequency.

Physics 1251 The Science and Technology of Musical Sound Unit 1 Session 8 Harmonic Series Unit 1 Session 8 Harmonic Series.

Hearing and Deafness 2. Ear as a frequency analyzer Chris Darwin.

Physics of Sounds Overview Properties of vibrating systems Free and forced vibrations Resonance and frequency response Sound waves in air Frequency, wavelength,

Sound waves and Perception of sound Lecture 8 Pre-reading : §16.3.

A.Diederich– International University Bremen – USC – MMM Spring Sound waves cont'd –Goldstein, pp. 331 – 339 –Cook, Chapter 7.

SPPA 6010 Advanced Speech Science 1 The Source-Filter Theory: The Sound Source.

SUBJECTIVE ATTRIBUTES OF SOUND Acoustics of Concert Halls and Rooms Science of Sound, Chapters 5,6,7 Loudness, Timbre.

Intro to Fourier Analysis Definition Analysis of periodic waves Analysis of aperiodic waves Digitization Time-frequency uncertainty.

Principles of analogue modulation

© 2010 Pearson Education, Inc. Slide Traveling Waves and Sound.

Angle Modulation: Phase Modulation or Frequency Modulation Basic Form of FM signal: Constant Amplitude Information is contained in  (t) Define Phase.

Measurement of Sound Decibel Notation Types of Sounds

ANGLE MODULATION 1. Introduction 2 Another class of modulation methods are frequency and phase modulation which referred to as angle- modulation methods.

Acoustics Seminary 3. Problem 3.1 Getting acquainted with Fletcher curves The 10 kHz sinusoidal signal of a wave generator is connected to a loudspeaker.

The Spectrum Jean Baptiste Fourier ( ) discovered a fundamental tenet of wave theory All periodic waves are composed of a series of sinusoidal.

Basic Acoustics + Digital Signal Processing September 11, 2014.

Basic Concepts: Physics 1/25/00. Sound Sound= physical energy transmitted through the air Acoustics: Study of the physics of sound Psychoacoustics: Psychological.

Lecture 1 Signals in the Time and Frequency Domains

Intensity, Intensity Level, and Intensity Spectrum Level

Wireless and Mobile Computing Transmission Fundamentals Lecture 2.

ECE 4710: Lecture #3 1 Signals & Noise  Received waveform contains the desired signal and the undesired noise  We will use deterministic waveforms (not.

Filtering. What Is Filtering? n Filtering is spectral shaping. n A filter changes the spectrum of a signal by emphasizing or de-emphasizing certain frequency.

Signals CY2G2/SE2A2 Information Theory and Signals Aims: To discuss further concepts in information theory and to introduce signal theory. Outcomes:

David Meredith Aalborg University

Periodogram of a sinusoid + spike Single high value is sum of sine curves all in phase at time t 0 :

Complex Auditory Stimuli

LPC-analysis-VOSIM-resynthesis Combined class December 18 th 2012 Johan & Peter Institute of Sonology Royal Conservatory, The Hague.

Voice Quality + Korean Stops October 16, 2014 Don’t Forget! The mid-term is on Tuesday! So I have a review sheet for you. For the mid-term, we will just.

Loudness level (phon) An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a.

Learning Objectives: 1. Identify the different parts of a sound wave 2. Describe the relationship between wave amplitude and intensity + wave frequency.

CHAPTER 4 COMPLEX STIMULI. Types of Sounds So far we’ve talked a lot about sine waves =periodic =energy at one frequency But, not all sounds are like.

Signals. Signals can be analog or digital. Analog signals can have an infinite number of values in a range; digital signals can have only a limited number.

The Speech Chain (Denes & Pinson, 1993)

Part 1 Principles of Frequency Modulation (FM)

The Spectrum n Jean Baptiste Fourier ( ) discovered a fundamental tenet of wave theory.

Cape Electrical and Electronic Technology Topic: Electromagnetic Waves By: Tahvorn George & Charles,J.

Fletcher’s band-widening experiment (1940) Present a pure tone in the presence of a broadband noise. Present a pure tone in the presence of a broadband.

The Frequency Domain Digital Image Processing – Chapter 8.

Measurement and Instrumentation

Lifecycle from Sound to Digital to Sound. Characteristics of Sound Amplitude Wavelength (w) Frequency ( ) Timbre Hearing: [20Hz – 20KHz] Speech: [200Hz.

Signals & Systems Lecture 17: Chapter 3 Spectrum Representation.

Basic Acoustics + Digital Signal Processing January 11, 2013.

ICSA341 (Updated 12/2001)1 Electromagnetic Signals Signals –Analog (signal intensity varies smoothly over time) Analog signals can have any value in a.

Loudness level (phon) An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a.

Fletcher’s band-widening experiment (1940)

Communications Engineering 1

Loudness level (phon) An equal-loudness contour is a measure of sound pressure (dB SPL), over the frequency spectrum, for which a listener perceives a.

A map of periodicity orthogonal to frequency representation in the cat auditory cortex. Gerald Langner, Ben Godde, and Hubert R. Dinse Examples of auditory.

Orthogonal Frequency Division Multiplexing

Signals and Systems Networks and Communication Department Chapter (1)

Wave interference and Beat Frequency

For a periodic complex sound

Lecture 3: Vibration in Transport presented by David Shires

Any type of vibration can be defined by

Speech Pathologist #10.

Sound shadow effect Depends on the size of the obstructing object and the wavelength of the sound. If comparable: Then sound shadow occurs. I:\users\mnshriv\3032.

Uses of filters To remove unwanted components in a signal

System Arch 2007 (Fire Tom Wada)

OUTLINE Wave Sinusoidal signal review Complex exponential signal

OUTLINE Wave Sinusoidal signal review Complex exponential signal

Features of A Wave Crest and Trough Crest:

Phase Shift Keying (PSK)

System Arch 2006 (Fire Tom Wada)

Communication Theory- I Course Code:17 EC 2206 Dr. G V Subbarao Professor Department of Electronics and Communication Engineering K L University.

Presentation transcript:

Noise Aperiodic complex wave Sound with an instantaneous amplitude that varies in a random manner. 1

White noise/Broadband noise White noise: Contains all possible frequencies Broadband noise: Contains all frequencies within certain broad limits Limits define the bandwidth of the noise These frequencies have the same average intensity or pressure Amplitude spectrum: Continuous and flat Phase spectrum: Random 2

Quantifying intensity of broadband noise Total power: Sum of the intensity of all the sinusoids in the noise. Spectrum level (No): Also called noise power per unit bandwidth Average intensity measured in a band of noise 1 Hz wide 3