Acoustics


 * //[[image:Imagen2.jpg width="172" height="169" align="left"]]

Do you ever think about controlling sound when you work in your design projects? //** No, when I design I never consider the sound control. I think this is just an error and that it is necessary to create a good design, so next time I’ll try to incorporate this aspect.

Have you ever thought about the effects that Architectural Acoustics can produce in the perception people have of certain places (residential building, office building, school, university, hospital, museum, library, church, gallery, concert hall or opera house)  Yes, for every place there are specific conditions about sound control just to make place work effectively and people feel comfortable. On places named before it is necessary to guarantee silent places where people can realize their activities without distractions.

 Did you know that elevated noise levels create stress, increase workplace accident rates, and stimulate aggression and other anti-social behaviors?  Yes, the elevated noise a level makes people feel uncomfortable and interfered negatively on their work and mood. When the sound is so loud people start to feel desperate so as great architects it is our mission to guarantee people feel pleasant and this can be possible thanks to a well thinking design that minimize noise levels and make places be always peaceful.

Did you know that unwanted noise in buildings can be prevented, reduced or controlled just by thinking about the acoustics of your designs and plans? How is that?  Yes, the unwanted noise in buildings can be controlled with a good design. There are many ways to minimize noise levels on places, such as, using isolated glasses, but it can also be possible with special designs on ceilings witch make the sound waves be missed.



 What are the unwanted noises people can be exposed to in different places? What about in your own house? Some of the unwanted noises could be the ones caused by the traffic outside and the parties of our neighbors. In my house there is a particular case of unwanted noise: The sound of the electric guitar of my brother, sometimes he likes to play the guitar at midnight and the sound makes me difficult to fall sleep.

The speed is the magnitude of the instantaneous velocity of an object. It is thus the scalar equivalent of velocity. The **average speed** of an object in an interval of time is the distance traveled by the object divided by the duration of the interval
 * [[image:Imagen7.jpg width="134" height="128" align="left"]]Speed **

It is the number of occurrences of a repeating event per unit time. For cyclical processes, such as rotation, oscillations, or waves, frequency is defined as a number of cycles per unit time.
 * [[image:800px-Sine_waves_different_frequencies_svg.png width="191" height="93" align="left"]]Frequency **
 * 

Wavelength ** <span style="font-family: 'Arial','sans-serif'; font-size: 10pt;">A wavelength is the spatial period of the wave, the distance over which the wave's shape repeats. It is a measure of the distance between repetitions of a shape feature such as peaks, valleys, or zero-crossings, not a measure of how far any given particle moves.

<span style="color: #33cccc; font-family: 'Arial','sans-serif';">

<span style="color: #000000; font-family: 'Arial','sans-serif'; font-size: 10pt;">A **transverse wave** is a moving wave that consists of oscillations occurring perpendicular to the direction of energy transfer. If a transverse wave is moving in the positive //x//-direction, its oscillations are in up and down directions that lie in the //y-z// plane.
 * Transverse**

**Longitudinal** <span style="color: #000000; font-family: 'Arial','sans-serif'; font-size: 10pt;">Longitudinal waves are waves that have the same direction of vibration along their direction of travel, which means that the vibration of the medium (particle) is in the same direction or opposite direction as the motion of the wave.

<span style="font-family: 'Arial','sans-serif'; font-size: 9pt; line-height: 115%;"> <span style="font-family: 'Arial','sans-serif'; font-size: 9.9pt; line-height: 115%;">On places where people needs to constantly give information the high sound levels are one of the most disturbing factors, because it makes badly the communication and produce negative effects on us.

To reduce sound levels, it is important to consider other descriptors that are directly linked to sound levels, such as Strength

__<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">The reverberation time is decided by: __ <span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">- Added absorption and how it is placed - The quantity and placing of sound-scattering objects such as furniture, shelves etc. - The size and shape of the room __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">The sound level is essentially determined by: __ <span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">- The amount of absorption __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">Clarity of speech is essentially determined by: __ <span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">The sound level that is constantly generated in the room will be effectively dealt with by the ceiling and be less dependent on sound-dispersing objects.

**<span style="font-family: 'Arial','sans-serif'; font-size: 9pt; line-height: 115%;">Places where is needed to take care of acoustic: **
 * Sound level reduction will be most important in a kindergarten.
 * In a music room, the response of the room in the form of reverberance can be the most important aspect.
 * In a teaching situation, it is important to give priority both to speech clarity and to reduction of sound level.
 * In an open office landscape, it is essential that the sound propagation is restricted in order to minimise disturbance, mainly between different work groups. It is important that the sound level falls quickly with distance.

In many cases, the use of sound-absorbing ceilings is a practical aid for achieving Room Acoustic Comfort. It’s effects on different acoustic descriptors are: __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">Reverberation time: __ The sound-absorbing ceiling will interact with the sound-dispersing furnishings in the room. __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt; line-height: 115%;">Sound level: __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt; line-height: 115%;"> The sound level that is constantly generated in the room will be effectively dealt with by the ceiling and be less dependent on sound-dispersing objects. __<span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">Speech clarity: __ <span style="color: black; font-family: 'Arial','sans-serif'; font-size: 9pt;">Suspended ceilings have a positive effect on speech clarity by reducing the reverberance in the room. A good, effective, sound-absorbing ceiling contributes to a good relation between early and late sound reflections in such a way as to benefit speech clarity.

<span style="font-family: 'Arial','sans-serif'; font-size: 9.9pt; line-height: 115%;">To stop noises, we can count with some soundproofing materials that now are available to ceilings, floors, wall, doors, and pipes. Those materials could be the solution in cases of noises from neighbours house or the traffic outside. Some of them are: The IsoTrax which is a complete soundproffing system for walls and ceilings, and the Quiet Barrier which is an excelent choise to recover some vibrating machines to reduce their noise.


 * [[image:claps.jpg width="168" height="215" align="left"]]About the video! **

-The sound is produce by objects vibrating, that depending of pressure and their speeds give acute or heavy sounds. -Every time we make a move, touch or break something we origin vibrations, just like kind of waves that make the sound appear. -When we clap our hands, the air entry between them and start to be in compression, then when it finds some space to escape origin vibrations that make sound.