Question: Question 1 Read the dtmf.wav audio file using audioread function of MATLAB. Identity the corresponding 4-digit dialed number. Show all your work and plot

Question 1 Read the

Question 1 Read the "dtmf.wav" audio file using audioread function of MATLAB. Identity the corresponding 4-digit dialed number. Show all your work and plot the Short-time Fourier Transform the DTMF digits ("spectrogram" or "specgram" in MATLAB). Please use a window size of 256 to estimate the digits. DTMF Frequency Table: Frequencies 697 Hz 770 Hz 852 Hz 941 Hz 1209 Hz 1 4 7 1336 Hz 2 5 8 0 For example, the digit 5 is "encoded" in a phone as follows: x5 (t) = cos(271336t) + cos(2 770t) 1477 Hz 3 6 9 # 1633 Hz ABC D Question 2 a) Calculate the pitch period of "a" of your "Washington" sound using the autocorrelation method and plot the autocorrelation function. b) Calculate the pitch period of "o" of your "Washington" sound using the autocorrelation method and plot the autocorrelation function. c) Calculate the pitch period of "o" of your "Washington" sound using the spectrum of the speech segment and plot the magnitude of the FFT.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Unfortunately Im not able to process sound files or execute code directly However I can guide you through the steps to perform the analysis as describ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Programming Questions!

Critically discuss the four change management approaches that farmers should adopt as part of digital transformation and include a brief description of each approach.

- When 0 2/3 rad. the angular velocity and angular Part A acceleration of the circular plate are 1.3 rad/s and Determine the magnitude of the velocity of the rod AB at this instant. = 3.5 rad/s,...

For this question, you will using both the direct capitalization method and the DCF method to estimate the market value of an office building. Show all your work in an excel document! You have the...

1 6 Consider the equation + -=2. The graph of this curve looks like this: (x-1) + y (x+1) +y2 y-axis (a) Find the positive y-intercept: 4159 52 52 x-axis (b) Find the negative y-intercept: (c) Use...

(Please show steps): Thanks :) P11-57A: Coleman Motors, Inc, was formed on January 1, 2018. The following tranasctions occured during 2018: On January 1, 2018, Coleman issued its common stock for...

Exercise: Using FFT, estimate the DTMF Tones in the given dialtone.wav file. The signal has a sampling rate of 8 kHz (fs = 8000 Hz). There are 4 consecutive DTMF signals of equal duration (1000...

Describe how to construct the function cpo ((D E), v) of two cpos (D, vD) and (E, vE). Prove that ((D E), v) is a cpo. (You may use facts about least upper bounds provided you state them clearly.)...

Python and most Python libraries are free to download or use, though many users use Python through a paid service. Paid services help IT organizations manage the risks associated with the use of...

Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...

I need a c++ code that: 1- Read from a text file using C++ example: mytext.txt 2- a function that adds three letters to each latter in that text file for example, if there is a "hello world" inside...

Without expanding the determinant, prove that |1 a b+c , 1 b c+a, 1 c a+b|= 0.

Describe the computation of free cash flow. What is its relevance to financial analysis?

( ompute the speed of a particle moving along the parametric curve c ( t ) = ( - 2 s i n ( 3 t ) , 2 c o s ( 3 t ) ) at time t = 5 .

Th e HGL and the EGL for a pipeline are shown in the figure. a. Indicate which is the HGL and which is the EGL. b. Are all pipes the same size? If not, which is the smallest? c. Is there any region...

Th e HGL and the EGL are as shown for a certain flow system. a. Is flow from A to E or from E to A? b. Does it appear that a reservoir exists in the system? c. Does the pipe at E have a uniform or a...

Suppose x and y are variables of type double. Write a code fragment that sets y to x if x is positive and to 0 otherwise.

See the survey described in Exercise 1. Assume that you must conduct a survey to determine the mean income reported on tax returns, and you have access to actual tax returns. How many randomly...

Item11Time Remaining 15 minutes 42 seconds00:15:42Item 11Time Remaining 15 minutes 42 seconds00:15:42A speaker should dress slightly less casually than their audience for a business presentation as a...

Consider a filter with frequency response or a sinc function in frequency. (a) Find the impulse response h(t) of this filter. Plot it and indicate whether this filter is a causal system or not. (b)...

Consider a series RC circuit with input a voltage source v i (t) and output the voltage across the capacitor v o (t). (a) Draw a negative feedback system for the circuit using an integrator, a...

Consider the following problems related to the periodicity of discrete-time signals. (a) Determine whether the following discrete-time sinusoids are periodic or not. If periodic, determine its...

=+b. What is P(xn11 , x1 and xn11 , x2), that is, the probability that xn11 is the smallest of these three observations?

=+a. What is P(xn11 , x1)?

=+c. What is P(xn11 , y1)? What is P(xn11 . yn)?