|
 |
 |
A floor impact sound is the noise generated when an impact is made on the floor. When the impact occurrs due to walking, falling of items, jumping by children, moving of furniture, etc., the floor slab is curved and vibrated, and the vibration radiates in the form of a sound in the air.
This is a structure borne noise, transmitted along with the structure, and generates some sounds.
1) Light Floor Impact Sound
The model of this sound is taken from the noises generated when Europeans who have a stand-up life are waling in bare feet, or sitting indoor.
The activities including running around by children, etc. generate heavy impact sounds, whose frequency bands are middle, or high frequency
2) Heavy Floor Impact Sound
The model of this sound is taken from the noises generated when Orientals such as Korean, or Japanese who have sitting - life styles are waling in bare feet, or sitting indoor.
The activities including running around by children, etc. generate heavy impact sounds, whose frequency bands are low frequency.
|
 |
| [The Regulations on Standards for Housing Constructions ] |
| ○ The Article 14(Boundary Walls between Households) |
③ The floors in an apartment house shall be less than 58 dB in a light floor impact sound between individual floors, and less than 50dB in a heavy impact sound. In these floors, a standard floor structure regulated and notified by the Minster of Construction and Transportation shall be applied.
④ The Minster of Construction and Transportation may decide and notify the performance grade for blocking floor the impact sounds in an apartment.
⑤ In case any constructor apply the performance of blocking floor impact sounds other than that of the aforementioned head 3, he/she shall acquire the approval for the performance from the institutions authorized by Minster of Construction and Transportation
|
▶ The Certification and Management Standards on the Floor Impact Sounds in an Apartment House
(The Notification of the Ministry of Construction and Transportation No. 2005-189, '05.06.30).
|
○ The Standard Floor Structure decided and notified by the Minster of Construction and Transportation
○ The Performance Standards on the Cushioning Materials for a Standard Floor Structure
○ The Certification Procedures, Standards, and Certification Organizations on the Structure for Blocking Floor Impact Sounds
○ The Performance Measurement and Evaluation Method for a Structure for Blocking Floor Impact Sounds
|
▶ The Certification on the Structure for Blocking Floor Impact Sounds in an Apartment House,
and the Specific Operation Guide for the Management('05.09) |
○ The Specific Contents not dealt with in the Notification
(Sampling, Certification Advise, Certification Charges, etc.)
|
| [Standard Floor Structure ] |
| ▶ The Floor Structure decided and notified by the Minster of Construction and Transportation |
① Wall Type Structure and Mixed Structure (5 Kinds of a Floor Structure based on Slab 210㎜)
② Ramen Structure (5 Kinds of a Floor Structure based on Slab 210㎜)
③ Plate Flat Structure (5 Kinds of a Floor Structure based on Slab 180㎜)
|
▶ The Component Materials including Cushioning Materials used for the Standard Floor Structure
shall be used after the separate quality confirmation. |
※ See the Article 27 and 28 of the Certification on the Structure for Blocking Floor Impact Sounds and the
Management Standards |
| [Certified Floor Structure] |
| ▶ The structure for blocking floor impact sounds other than the standard floor structure |
▶ The Structure whose performance has been secured in accordance with the Article 21 of the
Facilities Regulations on Structures |
▶ For the certification application, the attached documents for the Certification and Management
Standards for the Structure for Blocking Floor Impact Sounds(* 2) shall be submitted. |
▶ The light and heavy impact sounds are individually certified to be the grades (grade 1 -4) of the
performance for blocking light and heavy floor impact sounds. |
 |
 |
 
|
 |
 |
As seen in the pictures above, you may hit the floor with the light and heavy impact resources to generate impact sounds in the sound resource room; you can measure the sound press level of the impact sounds generated from the sound resource room using the micro phone.
- Impact Sound Generated: More than 4 points including the central point
- Mic. Installed: More than 4 points including the central point
The height of the microphone installed in the sound receiving room shall be 1.2 meter from the floor; the distance shall be 0.75 meter from the wall
(In case the floor area is 14 m2, the height shall be 0.5 meter)
|
 |
|
 |
 |
|
|
Light Impact Sound |
|
Heavy Impact Sound |
|
|
|
Grade |
|
Grade Standards |
|
Grade |
|
Grade Standards |
|
|
|
1 |
|
L’n,AW ≤ 43 |
|
1 |
|
L’i,Fmax,AW ≤ 40 |
|
|
|
2 |
|
43 ＜ L’n,AW ≤ 48 |
|
2 |
|
40 ＜ L’i,Fmax,AW ≤ 43 |
|
|
|
3 |
|
48 ＜ L’n,AW ≤ 53 |
|
3 |
|
43 ＜ L’i,Fmax,AW ≤ 47 |
|
|
|
4 |
|
53 ＜ L’n,AW ≤ 58,
Standard Floor Structure |
|
4 |
|
47 ＜ L’i,Fmax,AW ≤ 50,
Standard Floor Structure |
|
|
|
 |
| 1) Measurement Method |
|
The measure of the performance for blocking floor impact sounds shall be conducted and the levels of a light impact sound and a heavy impact shall be measured in accordance with the method regulated in KS F 2810-1 and KS F 2810-2.
|
▶ KS F 2810-1 KS F 2810-1
- "The Method of Measuring the Performance of Blocking Floor Sounds in the Field" - Part 1: The Method using Standard Light Impacts "
▶ KS F 2810-2 KS F 2810-2
- "The Method of Measuring the Performance of Blocking the Floor Impact Sounds in the Field - Part 2: The Method using Standard Heavy Impact Sources"
|
| 2) The Method of Evaluating the Measured Results |
|
The results of measuring floor impact sounds shall be evaluated in accordance with the evaluation method using Inverse A -weighted Curve among the ones regulated in KS F 2863-1 and KS F 2863-2.
|
▶ KS F 2863-1 KS F 2863-1
"The Method for Evaluating Floor Impact Sounds in Buildings and Building Elements
- Part 1："The Sound Blocking Performance using Standard Light Impact Sources "
▶ KS F 2863-2 KS F 2863-2
"The Method for Evaluating Floor Impact Sounds in Buildings and Building Elements"
- Part 2：" The Performance for Blocking Standard Heavy Impact Sources "
|
