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ACOUSTUCS – Part1

ACOUSTUCS – Part1

ACOUSTUCS – Part 1   Propagation of sound. Characterictics of sound waves. Wavefront , acoustic beam. Period and wavelength. Frequency of the sound. Longitudinal and transverse waves. Speed of sound.     As we know, the sound is the sensation caused by the vibration of the flexible body in agile environment. Parts of the agile environment transmit the vibrations through their mutual connection through intermolecular forces. The oscillation of every part of environment spread throughout the agile environment. Distribution of the periodic pressure variation on agile environment called … Read entire article »

Filed under: ESPOL, Sound theory

Acoustics Part 2

Acoustics Part 2

ACOUSTUCS – Part 2 PHASE CHARACTERISTICS OF SOUND   Initial phase of the signal   This is the position of the body from which it starts its oscillation. It is measured in degrees. If the body has begun fluctuation from equilibrium position, its initial phase is 0. If we deviate it in extremely positive attitude and let him go, the phase is 90. If two strings, membranes, pendulums or air columns begin their movement with a temporary delay to each other, we see a shift … Read entire article »

Filed under: Sound theory

Mixing on headphones. Microphone techniques

Mixing on headphones. Microphone techniques

Mixing on headphones. Microphone techniques     HEADPHONES vs. SPEAKERS    QUESTION I do not have the opportunity to buy good studio monitors. even if find a passive ones, ensuring of a quality power amplifier for them raises their prices back to the level of active monitors. Can I mix at home of quality headphones that can be purchased at a price several times lower than that of the monitors?   The answer is – no, you can not. Let’s see why. The financial … Read entire article »

Filed under: Sound theory

Some Psychoacoustics

  Some Psychoacoustics Psychoacoustics deals exactly with auditory perceptions and the way they are interpreted by the brain.Differentiation of strength and height, and the way of analyzing complex sounds and combinations of sounds are psychophysiological phenomenon. Understanding of this mechanism is the basis of the successful coding of sound and reducing sound data without getting a sense of great acoustic degradation. That is why this type of coding is called psychoacoustic. But let us first see what the physiology of hearing is. Ear generally comprises three sections – the external, middle and internal. The outer covers cochlea and the auditory canal, which focus and direct the received sound vibrations. The middle ear perceived, transmitted and amplified oscillation through the auditory membrane (eardrum) and three small bones – hammer, anvil and stirrup (the smallest bones in the human … Read entire article »

Filed under: Sound theory

Lecture 4 – Equalization – overview

Lecture 4 – Equalization – overview

Here is the presentation from the lesson about equalization … Read entire article »

Filed under: digital audio, ESPOL, Uncategorized

Lecture 6 – Reverberation

Lecture 6 – Reverberation

REVERBERATION   When we have a sound emitted in an enclosed space, upon arrival to the listener it comes with many discrete reflections from the surfaces of the room. These multiple reflections cause auditory impression of “prolongation” of the sound until the reverberation process died down. The amount of reverberation generated by the surfaces of the hall is directly proportional to the magnitude and and inversely proportional to the sound absorption, which is carried out from its surface.     The acoustic … Read entire article »

Filed under: Sound theory