Archive for the ‘Business’ Category

APT Sound Testing

Friday, January 15th, 2021

Airborne & Impact Sound Testing in London 

Sound Testing usually needs to be carried out between pairs of rooms separated by party walls and/or floors. Most sound tests are carried out between living rooms and bedrooms as these are classed as the two main habitable rooms; however, other rooms can be used if this is not possible such as studies, kitchens and dining rooms.

Our Sound insulation testing procedure is fairly simple and straightforward. Essentially, for party walls there is only one type of sound insulation test which is airborne sound test; however for party floors there is a requirement for two types of sound insulation testing – airborne & impact sound testing. Here is a brief description for each type: 

Airborne Sound Testing in London 

Airborne Sound Testing is carried out by means of a loudspeaker emitting a steady source of noise on one side of the partition (wall or floor) to be measured. The corresponding sound level is measured on the other side of the partition. Impact sound insulation tests are carried out by means of a tapping machine placed on the floor sample to be measured and the noise measured in the room or space below. Calculations are done based on these measurement and the above mentioned parameters are calculated and compared to the Building Regulations Part E sound insulation requirements for the given type of the building. It is important that the building to be sound tested is completely finished and sealed with no sound leakage through doors and windows.  Please see our check list for sound testing for more information. 

Airborne sound insulation testing is undertaken to walls & floors. Firstly a controlled noise is generated by an amplifier and loudspeaker across a broad range of frequencies. The generated noise is very loud and is often in excess of 100dB. Initial measurements are taken using a class 1 sound level meter within the ‘source room’ followed by further measurements in the ‘receiver room’ on the other side of the wall or floor under investigation. The source room speaker position is then changed and the measurements repeated either side of the partition under test. Thereafter background noise measurements are made using a class 1 sound level meter in the receiving room and are used to apply appropriate corrections for external sound such as traffic noise. Similarly the reverberation time (the time taken for sound to decay by 60dB) is measured within the receiving room using the sound source and a sound level meter to determine the corrections that must be applied to account for the characteristics and absorptiveness of the room. The difference in the two airborne noise levels (for walls and floors), corrected for background and reverberation characteristics determines the airborne sound insulation performance of the wall, or floor. A greater airborne noise difference between the source room and the receiver room determines a higher airborne sound insulation performance. 

The time taken to undertake sound testing varies from project to project as no site is exactly the same. Taking into account standard site conditions a set of tests on houses -two airborne walls will take one to two hours. A six pack of tests on flats – 2 airborne wall tests will usually take between one and two hours, although this is dependent on our engineers having full free uninterrupted access between all the units/rooms under investigation. 

Impact Sound Testing in London 

Impact sound testing is undertaken to floors only. This test is different; a calibrated Norsonic ‘tapping machine’ which comprises of five ‘hammers’ driven up and down by a cam and electric motor is used to “tap” the floor surface by applying a known force on the floor structure. The machine is placed in several pre-determined positions. The resulting noise is measured in the dwelling below, using a sound level meter. Thereafter, background noise measurements are made using a class 1 sound level meter in the receiving room and are used to apply appropriate corrections for external sound such as traffic noise. Similarly the reverberation time (the time taken for sound to decay by 60dB) is measured within the receiving room using the sound source and a sound level meter to determine the corrections that must be applied to allow for the characteristics and absorptiveness of the room. 

The time undertaken to test each project varies from project to project as no building/development is exactly the same. Taking into account standard site conditions a set of tests on houses which consists of two airborne walls will take approx. 1-2 hours. A six pack of tests on flats consisting of 2 airborne wall, 2 airborne floor and 2 impact floor tests will usually take approx. 2-3 hours, although this is dependent on our engineers having full free uninterrupted access between all the units/rooms under investigation. If you require sound testing, and/or acoustic design advice then please contact us now at via our blog at: http://aptsoundtesting.co.uk/blog/  or visit our website at www.aptsoundtesting.co.uk

FAQs Related to Online Dumpsters

Thursday, June 11th, 2020

Nowadays, people are more concerned about environmental issues. Different measures are in process to protect and take care of our surroundings. It has immensely popularised the dumpsters that maintaining cleanliness, hygiene, and a positive environment in our surroundings.

Numerous sites offer the knowledge of these bins, but the www.affordabledumpstersalbany.com is among those sites where within a click, you can get the best and complete understanding about the dumpsters. Here are the frequently asked questions about the trash that will help you in taking the right decision.

Can dumpsters be purchased online?

Yes, many reputed online sites offer a wide variety of container boxes online. These sites provide a complete guide about these boxes and help individuals in taking the right decision. The top service providers have a contract with the website that schedule their dumpsters online in minutes.

Are container boxes available on rentals?

The popularity of these large container boxes has explicitly increased due to this reason that they are available on rentals. Affordable dumpster rental for Albany offers the best economic-friendly option for the rental trash containers online. Also, renting is better than buying. So, rent away.

What maintenance is required?

The online sites include the maintenance services of the container boxes, and there are no additional charges. The service providers regularly come for repairs and maintenance works. There are no extra expenses on its regular maintenance. The truck service provider and the landowner will ensure adequate sanitization and hygiene to prevent the transmission of germs.

How to select the right container?

The boxes come under different sizes and a wide variety of ranges. Choosing the right one is quite tricky if proper guidance is not received. It is essential first to analyze the purpose of the container boxes. Different areas require different types and sizes of boxes. Look for the various custom design ideas that are available on online sites for deciding the right box type for your company. 

Are there any restrictions related to placing them?

There are some restrictions related to placing large trash boxes in some areas. Specific points should be kept in mind before placing the bins. The location approval is mandatory from the local authorities before placing bins. No more than two collection points are allowed in one area. Depending on the type of waste, many cities are restricted from putting their trash bins in a public place.