Binaural Beats

Acoustic Brainwave Entrainment with Binaural Beats Dr. Jeffrey D. Thompson, D.C., B.F.A. What are Binaural Beats? Binaural beats are auditory brainstem responses which originate in the superior olivary nucleus of each hemisphere. They result from the interaction of...

Interference Patterns of Sound Waves

Sounds are all around us, but how they interact affects how we experience them. In this lesson, we'll explore the patterns created by interfering sound waves. Afterward, you can test your understanding with a brief quiz. Sound Waves Let's conduct a scientific...

How Sound Waves Interact

Sound waves move through the air and hit your ear. If sound waves collide, they change the wave and ultimately how you hear the sound. How the wave changes depends on whether the waves meet constructively or destructively. Sound Waves If you've ever been to the Grand...

Abnormal Sounds: Basic Physical Exam Terminology

We are going to discuss the different abnormal sounds that may be observed when doing a basic physical exam and what they may tell the doctor is going on in the body. Physical Exam So, you know you should get a physical exam every year. You haven't gotten one up until...

What is Timbre in Music?

The music we hear is more than just a matter of pitch and rhythm. In this lesson, we'll explore the concept of timbre and see how it impacts the sounds that we hear. Timbre What color is your favorite kind of music? That may sound like an odd question to ask, but it's...

The Human Voice

How are guitar strings and the human voice similar? Here's a hint: both rely on vibrations to make sound. Complete this lesson to learn how the human voice is produced in the larynx using air and vibrations. Your Instrument What's your favorite song? To sing along to...

What is Echolocation?

Some animals have the ability to locate prey, navigate, and even communicate with one another using echolocation. This lesson will describe what echolocation is and provide examples of how it works. Understanding Echolocation Imagine you're a crewmember on board a...

Musical Timbre of Instruments and Singers: Definition

How can you tell if you are listening to a violin or a flute? How do composers use timbre to express their ideas and keep the listener interested? Find out in this lesson on timbre! What Is Timbre? No, we're not talking about trees here - we're talking about timbre!...

Ho Do Sound And Matter Interact?

Learn how sound and matter are related and what happens when a sound wave reaches a new material. Also discover how absorption and reflection of sound can be useful. Then, test your knowledge with a quiz. What is Sound and Matter? Matter is all around us. And so is...

Sound Quality: Definition, Differentiation & Noise

How does your brain tell the difference between a note played by a guitar and the same note played by a piano? The answer has to do with sound quality, or timbre. Learn about the characteristics that your brain interprets to distinguish sounds. Timbre When you go to a...

The Doppler Effect: Definition, Examples & Applications

What is the Doppler effect? How does it affect our perceptions of sound and light? In this lesson, learn how traveling wave sources can change the way we observe sound and light waves. Explore the applications of the Doppler effect on shock waves, sonic booms, and the...

Transverse & Longitudinal Waves: Definition & Examples

What comes to mind when you think of a wave? Chances are your mental image takes the form of a transverse wave. But, longitudinal waves are just as important, and understanding the difference is vital to learning about waves. In this lesson, explore both types of...

Vibrations and Waves: Energy and Motion

What is a wave? What causes waves, and how do they travel from one place to another? This lesson will guide you through the basics of waves. We'll discuss their origins from vibrations and investigate how they carry energy through a medium. Vibrations Have you ever...

Wave Parameters: Wavelength, Amplitude, Period, Frequency & Speed

How do we measure and describe waves? How do waves differ based upon their shapes? This lesson will guide you through the five wave parameters - period, frequency, amplitude, wavelength, and speed - that we use to characterize waves. Wave Parameters So, we've learned...

Resonance: Definition & Transmission of Waves

This lesson describes how sound and light waves are affected by the principle of resonance. Learn how resonance occurs through the vibrations and resonant frequencies of objects. You'll investigate everyday examples of resonance and learn how to break a wine glass...

Sound: Definition, Influences, Pitch & Volume

What is a sound? Learn about sounds and what influences how we perceive them, including pitch and volume. Test your understanding of sound features and finish off with a quiz. What Is Sound? Have you ever wondered how or why things make sounds? Sound comes so...

Sound Attenuation: Definition & Effects

What exactly is sound, how does it travel, and why does it change volume? There are a lot of questions we can ask about sound, and in this lesson, we'll explore the idea of sound attenuation to explain a few of them. Sound Attenuation Can you hear me now? And, what...

What is SPL (Sound Pressure Level)? – Definition & Examples

The pressure within a sound wave determines the loudness of the sound. In this lesson, learn how to calculate the sound pressure level of a sound wave and what this measurement represents. What Is Sound Pressure? When it comes down to it, your ears are pretty amazing....

Pitch and Volume in Sound Waves

What do pitch and volume mean when talking about sound waves? Further your understanding of sound waves in this lesson as we explore the more familiar aspects of sound. We'll learn about pitch and volume and how they relate to sound wave parameters. Sounds and Their...