Pitch Definition and 119 Threads

Is the relationship between the length of a guitar string and the frequency of the pitch it produces a linear relationship? e.g. If the frequency of the pitch of a string is 60 Hz and I halve the length, should it produce a pitch with a frequency of 120 Hz? This is assuming all other...

Firstly, I apologise if this is the wrong section, but as far as I could tell this was the most relevant. I have a pair of triplets (p1, y1, r1) and (p2, y2, r2). Each one describes a set of roll, yaw, and pitch rotations in that order, by the angles given by each component in respective order...

Homework Statement I thought that only the length that the sound travels affects the pitch. However, in low pressures/breathing helium the distance traveled by the gas is the same so how is pitch affected? Homework Equations none The Attempt at a Solution this is what i found from...

Homework Statement Question 1: A violin is tuned indoors to play the proper frequencies. A musician then uses the violin to play outdoors where the temperature is considerably colder. Wil the violin play too sharp (high) or too flat (low)? Ignore temperature effects on length and densityThe...

Homework Statement A 945N resistance force is overcome with a 13.5N effort using a screwdriver whose handle is 24mm in diameter. What is the pitch of the screw? Homework Equations Given: r = 24mm FE = 13.5N FR = 945N Pitch = ? r is radius FE is force effort FR is resistance...

I am analyzing the landing of an aircraft with the following assumptions: - I consider the main and the nose landing gear wheels as skids, in order to ignore the tyre deflection; - I have a 3 DOF aircraft model, with X and Y-axis indicating the forces acting respectively horizontally and...

Supposedly the Split-finger is suppose to 'tumble' or drop as you can find in most references to the pitch. But it's almost impossible to find the answer to "why?" (perhaps because baseball pitchers aren't physicists?) But I have a theory. It involves knowledge on the way the curveball (12-6...

I've been interested in this function Youtube offers on videos ever since I first used it a few months ago. It's amazing. Some videos are just way too long. The speakers will have something very informative to say, but they'll just ramble and/or speak very slowly. For some reason, Youtube only...

hi all, please provide me the info that what is the maximum allowable pitch difference for synchronizing of DG Sets having different pitch?

Homework Statement The roof of a ski cabin has a steep pitch to help snow slide off. What angle does the roof make with the horizontal? Homework Equations SOH CAH TOA The Attempt at a Solution I don't really know where to start considering I have no numbers to play around with so...

Hi, Is anyone able to explain to me how i take a required altitude and calculate the required pitch rate from it ? Or a very simple tutorial on the process ? Thanks in advance Regards Mike

A research on perception of pitch Homework Statement I've been working on a project. It's regarding the human perception of sound. I basically tested around 100 human subjects and made a report of it. The data of 60 individuals is in "google_science_fair..zip" attached with the post...

Homework Statement Here is question in objective form. I have tried answering it but am confused with the answer I got. Instruction: shade A if only IV is correct. Shade B if only I and III are correct. Shade C if only III and IV are correct. Shade D if I, II, III are correct. Shade E if...

Homework Statement A baseball player friend of yours wants to determine his pitching speed. You have him stand on a ledge and throw horizontally from an elevation 4.0 m above the ground. The ball lands 25 m away. What is his pitching speed?Homework Equations Kinematics Equations...

Homework Statement A baseball slugger connects with a pitch 4 ft above the ground. The ball heads toward the 10-ft-high center-field fence, 455 ft away. The ball leaves the bat with a velocity of 125 ft/s and a slope of 3 vertical to 4 horizontal. Neglecting air resistance, determine whether...

What can us non US citizens do to prevent freedom of information being taken away from the world? I thought this kind of thing was only imagined by conspiracy theorists. I actually did hear conspiracy theorists claiming this would happen years ago. This seems to be one of those situations where...

I want to design build and overall engineer a variable pitch turbocharger. This will go a long way in regulating both the hot and compressor sides flow rates, a larger turbo can essentially be used in smaller applications, and vice-versa. I want to use the VNT or VGT type turbos for my testbed.

Homework Statement A uniform magnetic field of magnitude 0.137 T is directed along the positive x axis. A positron moving at a speed of 5.40 106 m/s enters the field along a direction that makes an angle of θ = 85.0° with the x-axis (see figure below). The motion of the particle is expected...

Hi, How to determine a threshold aperture, at which the diffraction begins to limit resolution of the sensor ? Which situation reflects that point: 1) Airy disk diameter / 2 = 2 x pixel pitch http://www.outbackphoto.com/dp_essentials/dp_essentials_02/essay.html" (third pixel detects the...

Hello all, I have a PNI TCM2 electronic compass module, which has a 3-axis magnetometer and a 2-axis tiltmeter (manual: http://www.mil.ufl.edu/projects/gnuman/spec_sheets/tcm2_man.pdf" ), and provides heading with tilt compensation. The module also provides "pitch" and "roll" measurements...

I have heard that autocorrelation is used in pitch detection, but no proper or convincing explanation of how it is used. I had previously worked on echo removal using autocorrelation. But what puzzles me is that autocorrelation is done in time domain but how can this be used to detect...

Hi, have worked out the formula for a hyperbolic spiral space curve to be r(t)=1/t X cos(alpha)+1/t X sine(alpha) + t and obtained the tangent vector T, normal vector N, and curvature (kappa) with the z axis being the central axis of the spiral. Am having trouble finding the formula for the...

Say someone plays a note on the piano (an A, 440 Hz), and asks a man and a woman to both sing the same note, at the same pitch. The man will probably have to sing an octave higher (or the woman an octave lower) for them to sound like they're playing exactly the same note (and not just an...

Hello all! I am usually lurking and posting around the EE side of physics forums, but I have a project that deals with a little bit of mechanical stuff (please move this thread if I'm in the wrong place), and the mechanical aspect of engineering certainly isn't my forte. To be as superficial...

Hello everyone, i'm new to this forum and this is my first post. My question is: how to get pitch and roll of a moving vehicle using an 3-axis accelerometer? accelerometer values are the same when vehicle is stopped? Thanks in advance.

There are two references frames, A and B. Let A's reference frame be denoted by the columns of the identity matrix, and let A's origin be (0,0,0). Let B's reference frame and origin be denoted by a transformation matrix T, where T = R11 R12 R13 x R21 R22 R23 y R31 R32 R33 z 0 0 0 1...

This may seem like a fairly simple question, but I want to know if the temperature of the air affects the pitch of a note produced by say an instrument or by someones voice? I play guitar and I know that if I leave my guitar in the cold for too long (or the heat) the tuning gets all messed up. I...

How would I work out the pitch circle and number of teeth required to move the mechanism a certain amplitude? Looked over 4-5 sources for pitch circle, but cannot make sense of it..

Pure tones with frequencies 440Hz and 448Hz are sounded together. What is heard? (Describe pitch of the fused tone and frequency of beats.) I'm very confused with the way my book explains this, it says that we will hear audible beats at the difference frequency, which in this case would be 8 Hz...

hi how can i convert accelerometer vector to quaternion and then convert it to pitch and roll? i want full 360 degrees of roll and pitch

Yes, ladies and gents, it's in the record books: http://sports.yahoo.com/mlb/news?slug=sh-redspadres092410". But what a conflagration! I still can't discern who actually won the game!

I have multiple robot cells that i would like to move fixtures from robot to robot with the out come of the part to be perfect. in order to do that i need to make sure my work object is in the same spot each time. so i need to find the yaw pitch and roll and convert them into Euler angles. On...

How can I calculate the pitch of a hovercraft propeller, what variables do I need? How do I know how many blades must I use to get the ultimate end result?

Hi there, I saw this question in a book. Basically, we are asked to comment on the effects of Tension of a guitar chord and the Elasticity of the chord itself on the frequency of the sound the guitar produces. I understand Elasticity will have a positive effect on the speed of sound, and...

So many times we heard Bush Senior use "moving forward" to characterize policies that may or may not have been productive as "progressive". By 2010, when some politician says we are "moving forward" with some policy or another, my Bull$**** Radar goes into high gear and I relegate the rest of...

ive been given a problem in my school work. it involves 2 veins that have been cut by a fault and displaced along the fault plane. the question gives the orientation of the cut veins on either side of the wall and the orientation of the fault. it asks for the following: net slip, plunge and...

I have to estimate the pitch rate and the roll rate of a vehicle, from measured accelerations. I have many three axial accelerometers. How can i accomplish it?

I need to study about the variable pitch propeller and its mechanism of adjusting the angel of the blades. And also about the materials used to make propellers and their benefits.. can someone please help me to find sources such as images/videos about the variable pitch propeller? or...

Im trying to find an equation for a helix that gets wider and thinner yet the angle of all the coils remains constant. Is this possible? Any ideas? Thank you! PS - I am not a math expert, but throughly enjoy the process! walt

With DFT/FFT/SFTF or similar Fourier transforms, there's always a trade off between frequency and time resolution. It's like the 'uncertainty principle' for signal analysis. I have a few questions regarding this: 1: With a theoretical infinitely fast processor, is it possible to obtain...

Pitch side bib! what on Earth is that?? Pitch side bib! what on Earth is that?? Hey guys, I'm translating some stuff and I've recently stumbled upon something I can overgo and I've puzzling over for hours... The thing is "pitch side bib". Does anybody have a clue what it means? Or where I...

Homework Statement A 150-g baseball pitched at a speed of 40 m/s is hit straight back to the pitches at a speed of 60 m/s. If the bat is in contact with the baseball for 5 ms calculate the magnitude of the average force exerted by the bat on the baseball. Homework Equations Favg = delta...

how to find roll, pitch yaw... given an x,y,z position for the end of an robot arm(end effector), is there any way to find the roll, pitch and yaw for it...Given access to entire history of x-y-z positions. I'll be using IK then to evaluate whether these values are possible or not. All I need...

how will the air temperature in a room affect the pitch of organ pipes?

I have always wondered why there is a noticeable change in the sound of water flowing from a pipe when the water temperature changes. When I first turn on the hot water faucet after a long period of being off, there is a steady pitch of sound I hear. I am referring not to the sound of the water...

Alrighty-then:smile:Homework Statement This is from a book called "Engineering by Design." It sucks. Really. It asks problems and doesn't provide sufficient information to answer them. Now that I have complained, here is the question: Explain with sketches why a combination of rotations...

Can anyone please help me figure out how to calculate the change in pitch [in cents] for a piano wire with a given change in temperature? I am not really sure where to start. I assume that I will need to first figure out the thermal expansion of the wire, but how do I then take that...

Homework Statement The uniform 26.0 mT magnetic field in the figure points in the positive z-direction. An electron enters the region of magnetic field with a speed of 5.50E6 and at an angle of 30 deg. above the xy-plane. The problem defines the pitch to be the distance between the...

Dose anyone know the relationship of cube root numbers and the fraction of 1/8 "Assuming a body of a size represented by X has a pitch of 1024 per second, then a pitch of 2048 (double 1024) per second will be produced by a body having a volume of some mean between 1/8 of X and the cube root of...

The physics of sound have been explained by many people but the relationship of practical applications are a blur. I am a brass instrument player and designer of bras instruments the relationship between bore size, taper and length are very crucial and way over most peoples head. so here is...