The topic this week is Deep Listening and we will explore the following focus areas:

SOUND WAVE | FREQUENCY | LOUDNESS | SOUND ENVELOPE

FOCUS AREAS IN DEPTH

SOUND WAVE

LOUDNESS

OVERVIEW SPECIFICS EXPLORE

OVERVIEW

sound wave imageSOUNDWAVE - A sound wave is the vibration of molecules in an elastic medium such as air. The sound wave is comprised of numerous properties that make it distinct including frequency, amplitude, pitch, and timbre.

SPECIFICS

Ben Miles, University of Bristol

EXPLORE

NPR - What Does Sound Look Like?

ScienceOnline - How Speakers Create Sound

DNews - The Coolest Things Sound Waves Can Do

National Institute of Health - Ultrasound Part 1: What is Medical Ultrasound?

National Institute of Health - Ultrasound Part 2: How Ultrasound Works

TED-Ed: The Sonic Boom Boom Problem

OVERVIEW SPECIFICS EXPLORE

OVERVIEW

amplitude image LOUDNESS - The size or height of the sound wave. The more intense the vibration, the more molecules are displaced resulting in a taller wave. The size or height of the wave is called amplitude, measured in decibels (dB). Most commonly decibels are used when referencing Sound Pressure Levels (SPL). Where 0 dB-SPL is the threshold of hearing and 120 dB-SPL is the threshold of pain. This scale is called Dynamic Range.

SPECIFICS

EXPLORE

What Does a Decibel Sound Like?

Fletcher Munson Curve

(Advanced Monitoring/Metering) Pro Audio Files - dBVU vs dBFS

FREQUENCY

SOUND ENVELOPE

OVERVIEW SPECIFICS EXPLORE

OVERVIEW

frequency imageFREQUENCY - How many times, or the number of cycles, a source vibrates per second, measured in Hertz(Hz). Psychologically humans perceive frequency as pitch in the relative lowness or highness of a sound and can generally hear frequencies between 20 and 20,000 hertz.

SPECIFICS

OVERVIEW SPECIFICS

OVERVIEW

Envelope ImageSOUND ENVELOPE - Each sound has its own individual envelope or a package of smaller attributes that make each sound unique. A sound envelope has four distinct parts; Attack, Decay, Sustain and Release.

SPECIFICS

Wick van den Belt, WickieMedia

  1. Attack – How the sound starts from its source upon being vibrated.
  2. Decay – The point at which the sound starts to lose amplitude
  3. Sustain – The period of time the dynamics of the sound are maintained following its initial decay.
  4. Release – The time the sound fades into inaudibility
SPOTLIGHT

INSIGHTS