Introduction

Have you ever been at the airport and noticed how loud planes can be when they take off or land? Or maybe you’ve heard a plane flying overhead and wondered why they make so much noise. In this blog, we’ll explore some of the reasons why planes make so much noise and how engineers are working to reduce this noise.

The Sound of a Jet Engine

One of the main sources of noise from planes is the jet engine. Jet engines are powerful machines that burn fuel to create a high-speed jet of exhaust gases that propel the plane through the air. The process of burning fuel and creating this jet of exhaust gases is very loud, and this noise is amplified by the fact that the engine is mounted on the plane’s wing, which is close to the ground.

The Sonic Boom

Another source of noise from planes is the sonic boom. A sonic boom is a loud explosion of sound that is created when an object, such as a plane, breaks the sound barrier by traveling faster than the speed of sound. Sonic booms can be heard for miles around and are known for their loud, distinctive sound. While sonic booms are usually associated with supersonic flight, they can also occur at subsonic speeds under certain conditions.

Why don’t we hear the sound inside the plane?

You can’t hear airplane noise inside an airplane because the noise is drowned out by the noise of the engines and other aircraft systems, as well as the noise-cancelling properties of the aircraft itself. The noise inside an airplane is often quite loud, with the noise level inside the cockpit typically ranging from 80 to 100 decibels. This is much louder than the noise level outside the aircraft, which is typically around 70 decibels at cruising altitude.

Additionally, the walls, windows, and other structures of an aircraft are designed to reduce noise by absorbing and dissipating sound waves. This helps to create a quieter cabin environment for passengers and crew. The noise-cancelling properties of an aircraft are especially important for the comfort and well-being of passengers, as long-term exposure to high levels of noise can lead to hearing loss and other health problems.

Reducing Aircraft Noise

Engineers are working to reduce the noise produced by planes in a number of ways. One approach is to design quieter engines. Modern jet engines are significantly quieter than older models, thanks to advances in materials and design. For example, newer engines use composite materials and advanced aerodynamics to reduce noise, and they also have noise-reducing features such as fan blades and exhaust nozzles that are designed to reduce noise.

Another approach to reducing aircraft noise is to design planes with noise-reducing features, such as noise-absorbing materials and specially shaped fuselages. Some planes also have noise-reducing wingtips, which can help to reduce noise at takeoff and landing.

In conclusion, planes make noise for a variety of reasons, including the noise produced by jet engines and the sonic boom created when planes break the sound barrier. While planes will always make some noise, engineers are working to reduce this noise through advances in engine and aircraft design.

TL;DR

The noise from planes comes from the jet engines and the sonic boom created when planes break the sound barrier. You can’t hear airplane noise inside an airplane because of the noise-cancelling properties of the aircraft. Engineers are working to reduce this noise through advances in engine and aircraft design, such as using composite materials, advanced aerodynamics, and noise-absorbing materials. Planes will always make some noise, but efforts are being made to reduce it.