| Title |
A Research on the Measurements of Sound Power Level |
| Abstract |
This article describes principle of sound measurements, measuring method and the other contents as follows;It is necessary for highly efficient measurements of sound power levels that anechoic room or semi anechoic room of good performances in free sound field and semi free sound field.Noise measurements are possible to enough partly by sound intensity method in the field.Recently, 2-Microphone method has been possible to practical use on measurement according to increase in quality of micorphones and signal treatment technique of FFT method.More better measuring, values will gain to applicate, if searching examination is definite its particle speed from sound pressure of two points, through sound intensity proof is in use of supersonic elements.It is expect that interval of two-microphone are belong to study on technique of spaces of microphone from condition of measuring objects in measurement of sound intensity method. |