Acoustics


 * Speed:** A rate (usually rapid) at which something happens.

Frequency: Is the number of occurrences of a repeating event per unit time.
 * Wavelength: **The distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave.




 * Longitudinal: ** related with the acoustic are waves that have the same direction of oscillation or vibration along their direction of travel, which means that the oscillation of the medium (particle) is in the same direction or opposite direction as the motion of the wave. Mechanical longitudinal waves have been also referred to as compressional waves or compression waves.

**Transverse:** also known as shear waves, have an additional property of polarization and are not a possible characteristic of sound waves. Sound characteristics can depend on the type of sound waves (longitudinal versus transverse) as well as on the physical properties of the transmission medium

The video called "High speed film" shows how the sounds waves affects differenets objects. The most amazing for me was the glass cup, because whe can see the interesting state that adoppte without breaking.


 * Rooms Acoustics:

 Room acoustics are about the way in which sound behaves in a room. **The field of building acoustics covers sound insulation too, where the route that the sound takes from the room to other areas is included. For that reason the architects and the urban planners has to get in mind few aspects when they will build or design any spaces; some of that aspects are the persons who going to be there, the activities or the purpose of the space and the materials to use.

 What do you as an architect need to consider regarding Room Acoustic Comfort?

**The reverberation time is decided by:** - 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

- The amount of absorption
 * The sound level is essentially determined by:**

- Early sound reflections in relation to late sound reflections - Background noise
 * Clarity of speech is essentially determined by:**

=** What must you as an architect do to achieve Room Acoustic Comfort? **=

The ceiling’s sound-absorbing properties are described in sound absorption classes (A-E) in an international standard. Class A is the highest level of sound absorption.

**Reverberation time:** The sound-absorbing ceiling will interact with the sound-dispersing (scattering) furnishings in the room. The more sound-dispersing (scattering) objects there are, the greater the benefit of the ceiling. In a sparsely furnished room, the reverberation time can be long as the sound energy lingers between sound-reflecting walls.

**Sound level:** The sound level that is constantly generated in the room will, on the other hand, be effectively dealt with by the ceiling and be less dependent on sound-dispersing (scattering) objects. A sound absorption class A product provides the most effective decrease of the sound level.

**Speech clarity:** 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.

=Soundproofing: Materials designed for block and isolate sound, reduce noise from traveling through building materials. =

**Sound Absorption:**  Materials designed to improve sound quality and speech clarity by reducing echo.