How To Tie Converse Double Upper Hi Tops

Item 5 _ The sound architecture. Item 4 _

CHAIN \u200b\u200b ACOUSTICS IN OPEN SPACES.
Definition Sound: is a vibratory phenomenon spreads through an elastic medium and is perceived by the human ear.
To have a sound must be a string acoustic made by a source that generates the vibration phenomenon, a means, and elastic material for which the wave propagates and can be either gas or liquid and solid, and a receiver that receives information (the ear).
The sound is caused by an molecular motion, these molecules collide and transmit energy. That is why the most dense (closer together molecules) transmit sounds better. Often
development and urbanization are the main sources of noise pollution, which results in discomfort and damage mainly affecting the ear and the central nervous system and endocrine system.
the isolation of both airborne noise as the sound track is like with enclosed spaces, establishing a considerable distance between the source and the receiver and using considerable mass enclosures (for airborne noise) and materials absorbent (porous) and may be at such as trees or uneven surfaces. In turn, the discontinuity, the change of environment will be very effective.
ACOUSTIC COMFORT IN CLOSED SPACES.
SOUND INSULATION. Definition of noise
: 's all unwanted sound.
There are different ways to isolate the noise.
AIRBORNE NOISE - SOLUTIONS .
1) Phase shift in time. Making
far from the noise and activity not match. The quartermaster may make provision for it.
2) Distance.
Sound travels in all directions "forming" an increasingly large area as we move away source, becoming less and less intensity.
3) Equipment enclosures.
The insulation of an enclosure increases with the mass per unit area. Law of mass : The sound level transmitted from one place to another, it diminishes in proportion to the weight of the element through which passes the sound. Also by double panels consisting of two thin walls separated by an elastic medium (either air or absorbent material). Principle of Elasticity: The sound level decreases the more elastic is the material that makes up the dividing element; (+ elasticity, - transmission).
4) Design a proper sealing the openings.
The sound passes through the slits, to avoid this you can place pads, increasing points of contact between the leaves and window frames, and more.
5) Isolate the sound source.
For example a water pump cover with a considerable mass element.
6) Personal Protection.
used by those working with machines. Example caps.

ROUTE NOISE BY SOLID.
There are two types of noise via sound: The impact noise and vibration. The former included the steps and falling objects or crawling among others. These sounds are propagated by both the structure and by air. Then there are the vibrations produced by such machines, motors and pipes. Only propagate through the structure.
transmission of impact noise is much more intense than in the case of air as the coup has a much higher energy intake on the surface. In this case it applies the law of mass.

NOISE FOR SOUND TRACK - SOLUTIONS.
1) Isolation of the sound source.
Flooring elastic materials "inhibit" the noise impact its softness. Examples of this can be carpets, rugs, cork or plant fibers.
2) Isolation of discontinuity.
is based on the use of an elastic separation between the pavement and the support. Thus, the vibration generated on the pavement with light intensity is transmitted to the support due to the damping produced by the elastic medium. This is usually done between a floor and a building and called floating slab.
AUDIBILITY

refers to the intelligibility of sound within a room. If a satisfactory condition requiring communication (such as a classroom) is necessary to study its acoustics and audibility.
Factors affecting audibility.
1) Eco
occurs when direct and reflected sound does not reach the ear at the same time, we see first direct and then reflected.
2) masking.
A hidden sound to another. Sometimes it is convenient.
3) Distribution of sound.
Depending on the shape of the room the sound is reflected in different directions and therefore is distributed in a certain way.
- convex forms, direct reflections from all directions, are good broadcasters .- concave focus the reflections are not good broadcasters. (They tend to centralize the sound at one point).
- Other elements that influence the diffusion of sound are the irregularities of the surfaces, the size of the room, the distribution of absorbent materials and terrain irregularities.
4) Long reverb.
is the time where the sound vibrates in the air without becoming extinct, is still perceived by a fraction of time after the occurrence. Thus, the direct and reflected sound overlap in a protracted hearing. The reverberation time is directly proportional to the local volume and inversely proportional to absorption. If local walls are covered with absorbent materials is greatly reduced.
When completely eliminate the reverb would get a dry sound that is not nice, and if prolonged hearing can be confusing. ABSORPTION
.

Reflected sound is always less intense than the incident. The share of energy that is not reflected is absorbed and transformed into heat.
The absorbent materials are porous and are used to eliminate echo or obtain appropriate reverberation times.