Year 11 Physics: the World Communicates Dot Points

A sound wave is a disturbance that repeats regularly in space and time and that transmits energy from one place to another with no transfer of matter. In Activity 2 on page 8 we had to model sound waves using an instrument. In our class we used a flute as the example and when the person blew into it, sound waves were produced. As they blew and changed the volume and pitch the sound waves changed. A sound wave is created when something vibrates. When something vibrates, longitudinal waves are created which we can hear. A longitudinal wave is a wave that transfers energy through compressions and rarefactions in the material that the wave travels which are all parts of a sound wave. In Activity 2 it states in some parts of the wave, the air molecules

When I think about pitch the first things come to mind are instruments. This reminds me in middle school if you wanted to a part of the band, you got to test each instrument. I always had a fascinating with a flute, which had high a frequency and high pitch. Another instrument was a trombone; this had a low frequency and low pitch. This helped me understand the difference between pitches.

In this experiment, the signal generator was set so that the frequency meter showed a reading of 1,803 Hz. The microphone was moved to a distance from the speaker so that the oscilloscope displayed a straight diagonal line. This position was of the microphone was recorded as the initial position, or beginning of a wavelength. The microphone was then moved farther in the same direction until the oscilloscope displays the same horizontal line. This position was recorded as final position, or the end of the wavelength. The distance between the two positions represents one wavelength for this frequency. This was repeated for frequencies of 2,402 Hz, 3,002, Hz, 3,602 Hz, and 4,201 Hz.

Communication has been a real asset to humankind by having the capacity to exchange data starting with one then onto the next. While numerous diverse structures exist, for example, gesture-based communication, talking, and non-verbal communication, it is telecom that has changed the world all through the last hundred or more years. The information transfers framework has three separate things with a particular end goal to transmit what will exhibited. Person begin by the source or transmitter, which is then put into a medium or correspondence line, and ultimately there is a sink, or beneficiary that the data is yielded

Ultrasonic sensors emit short, high-frequency sound pulses at regular intervals. These propagate in the air at the velocity of sound. If they strike an object, then they are reflected back as echo signals to the sensor, which itself computes the distance to the target based on the time-span between emitting the signal and receiving the echo.

Sound waves are nothing more than an energy transfer through a medium be it through a liquid, solid, or a gas. Sound pressure or intensity is measured on logarithmic scale in decibels dB which increases on an order of magnitude. For instance a quiet conversation would be around 30 dB and whereas the human pain threshold would be just over 100 dB. While the pitch or frequency of the sound is measured in hertz or Hz, the higher the hertz the higher the pitch of the sound and vice versa (Hildebrand, 2004).

In ultrasound, Acoustic impedance (Z) is the quantity of measurement of resistance to sound when passing through a medium (Hedrick,Hykes&Starchman 2005, p.10).

The snail like shape of the cochlear effectively boosts the strength of the vibrations caused by sound, especially for low pitches. When sound waves hit the ear drum, tiny bones in the ear transmit the vibrations to the fluid of the cochlea, where they travel along a tube that winds into a spiral. The tube’s properties gradually change along its length, so the waves grow and then die away, much as an ocean wave travelling towards the shore gets taller and narrower before breaking at the beach.

Musicians know that all vibrating objects make sounds. Frequency measure how many times a string vibrates up and down. If a musician changed the length of the string, it also changed the frequency. High frequency will always equal a high pitch. When an octave is increased the frequency will double. Pythagoras discovered different sounds could be made with different weight and vibrations. Due this discovery, they also realized pitch could be controlled by the length of the string.

Sound is a wave, and a wave can be remembered as a medium, carrying energy from one point to another. The sound wave has a resemblance of a slinky in its nature, for many reasons. The disturbance goes from one place to another, carried by the medium. Typically, the medium will carry energy through the air, although it could be any substance like water and steel. There is an original source of the wave; anything from someone’s vibrating vocal chords, or a tuning fork. Then, the sound is transported through the medium through particle-to-particle interaction. If the sound wave is moving through the

It is within this framework that I consider important to study the way in which sound is

The wavelengths become closer and closer as the source of the sound moves closer to an observer which results in a higher frequency of sound waves. This in turn makes the source sound loader. The opposite is true for if the source of the sound is moving away from the observer the sound waves become more spaced out and lower frequency which makes the source sound quieter.

What is a sound wave? A sound wave is produced by a mechanical vibration, such as a tuning fork. The vibrating object causes the surrounding medium, such as air, to vibrate as well.The wave travels through the medium to a detector, like your ear, and it is heard.As with any type of wave, a sound wave is also described by it's wavelength, amplitude, period, and frequency.

Koch, Apri. "Transverse & Longitudinal Waves: Definition & Examples - Video & Lesson Transcript." Study.com. April Koch, n.d. Web. 15 Mar. 2017.

Have you ever sat down and wondered why you can hear things? How sounds form? What are the different components? This all happens because of sound waves. Sound Waves are disturbances that go from one place to another in a medium. An example of this could be a Slinky. when it is all stretched out the slinky would be at equilibrium. Then a particle in the slinky moves in any direction and makes a disturbance. A pulse allows you to see the disturbance that is happening from both ends of the slinky . when a pulse is repeated continuously through the slinky then it is a wave.