Pitch, Frequency, Period, Loudness, Timbre
The higher the frequency, higher is the pitch, and more energy the wave (sound What is the relation between frequency and amplitude?. Amplitude is important when balancing and controlling the loudness of Frequency is the speed of the vibration, and this determines the pitch of the sound. Let's discuss the characteristics of sound waves like amplitude, frequency, in Waveform and representation of Amplitude/ Loudness and Wavelength Two graphs showing the difference between sound waves with high and low amplitude The piano produces a distinct note whereas the bell struck to the same pitch and.
Two graphs showing the difference between sound waves with high and low amplitude Wavelength The waveform representation converts the pressure variations of sound waves into a pictorial graph which is easier to understand.
A sound wave is made of areas of high pressure alternated by an area of low pressure. The high-pressure areas are represented as the peaks of the graph. The low-pressure areas are depicted in the Valleys. The physical distance between two consecutive peaks or valleys in a sound wave is referred to as the Wavelength of the sound wave. It is labeled in the image above. This parameter decides whether a sound is perceived as high pitched or low pitched.
In sound, the frequency is also known as Pitch. The frequency of the vibrating source of sound is calculated in cycles per second. The time period is the time required for the wave to complete one cycle.
Wavelength and frequency of a sound wave are related mathematically as: The first graph represents a sound wave from a drum while the second graph represents the sound wave from a whistle. You probably already know the difference in the sounds but have a look at the difference in their frequencies. Two graphs showing the difference between sound waves with high and low frequencies and their corresponding pitches Timbre Imagine a bell and a piano in an orchestra.
Characteristics Of Sound Waves: Amplitude, Frequency, Wavelength And Timbre
The same musical notes can be obtained by both the instruments but their sounds are very different. The piano produces a distinct note whereas the bell struck to the same pitch and amplitude produces a sound that continues to ring after it has been struck.
This difference in the sound is referred to as the Timbre. Timbre is actually defined as; if two different sounds have the same frequency and amplitude, then by definition they have different timbres. In this article, you learn about the different characteristics of sound waves and how two sound waves of even the same amplitude and frequency can produce completely different sound.
The world around you is filled with interesting facts like these. Practise This Question Assume the force of gravity to be constant for short heights above the surface of the Earth. A body is dropped from rest at a height h.
What is the period and frequency of the wave on the following graph? Repetitive sounds can be formed in different ways. The most common, of course, is from a musical instrument. But, now, consider the situation where you are standing in front of a set of bleachers and you strike a bass drum: The individual echoes of the drum off each step are delayed from one another.
So, to the drummer the echoes form a repetitive sound which then is heard as a pitch. Anyone who has played in a marching band can attest to this! Amplitude - Loudness Besides the pitch of a musical note, perhaps the most noticeable feature in how loud the note is.
The loudness of a sound wave is determined from its amplitude. While loudness is only associated with sound waves, all types of waves have an amplitude. Many things can influence the amplitude. What is producing the sound?Frequency-Pitch and Amplitude-Loudness Relationship
How far are you from the source of the sound? The farther away the smaller the amplitude. Sound does not travel through walls as well as air.
Characteristics Of Sound Waves: Amplitude, Frequency, Wavelength And Timbre | BYJU'S
Depends on what is detecting the wave sound. Shape of the repetitive motion. Although a wave repeats in time, its motion during on oscillation can be simple or highly complex. For example, the following two graphs each show repetitive motion and the period and frequency of the motion is the same in both cases.
In fact, their amplitudes are also the same. Thus, if these two waves represented sound waves, the pitch and loudness would be the same in both cases. But would they sound exactly the same?
The answer is No, because there is one more attribute to sound waves that you are familiar with, and that is tone quality.
This is what makes different instruments sound different. A violin and a trumpet can play the same pitch with the same loudness, but we can easily tell them apart, because they have a different tone quality. In fact, the same instrument can create different tone qualities.