Audio Properti

esIntroduction to Music Production – Week 1

By Julian A. Gomez C.

Introduction

Hi everyone! My name is Julian, I’m from Colombia, I am a 14 years old guy, coursing 8th grade on my school having a music focus-education.

I play the piano in my school’s orchestra, and on my Tropical Music band, and also I am learning to play the guitar.

In this presentation I will show teach you about the properties of the audio, taking in count Amplitude, Frequency and Timbre.

What is sound? As we know sound is whatever we can hear,

a voice, a door, a plane, a telephone, etc. Sound is a vibration that propagates through a medium such as air or water and it’s made from pressure variations in the air.

Everything sound we hear it’s produced by something, for example, a drum produces sound via a vibrating membrane, the voice produces sound through the vocal folds, etc.

Propagation of sounds Sound moving through a medium is known as

propagation. Sounds moves through the air in a longitudinal

wave pattern, but sometimes is represented as a transverse wave pattern.

Sound wave A sound wave is the pattern of disturbance

caused by the movement of energy traveling through a medium.

The sound wave includes several properties as Amplitude and Frequency.

Amplitude Amplitude is the size of the vibration, and this

determines how loud the sound is. The increase of the loudness is called compression, and a decrease is known as rarefaction.

Increasing or decreasing amplitude is called amplification /attenuation.

Amplitude The Amplitude is measured in Decibels (dB). Digitally, amplitude is measured as Decibels

related to Full Scale (dBFS) which have a defined maximum available peak level (0).

Frequency Frequency is the number of occurrences of a

repeating event per unit time, measured in the number of wavelengths over a period of time.

The human perception of Frequency is known as pitch.

Frequency In sound, frequency is measured in Hertz (Hz). One cycle per second is 1Hz, ten cycle per

seconds are 10Hz. The range of human hearing is approximately:

20Hz-20.000Hz (2kHz).

Timbre Timbre, also known as tone color or tone quality is the

quality of a musical note or sound or tone that distinguishes different types of sounds, such as voices and musical instruments.

This sound characteristic is associated with the complexity of the sound wave reaching the ear, that is the overlap of the various harmonics and the respective relative intensity.

All these properties are needed to recognize the

difference between music and noise.