7、If the toy has a clearly defined operating cycle, measure the time average (the equivalent continuous) sound pressure level in each microphone position during at least one whole cycle.
3、The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.
8、The next remedy is to absorb it on its way to the ear. It is true that the overwhelming majority of noise problems are best resolved by effecting a reduction in the sound pressure level at the receiver
5、The protection of the ear to reduce sound pressure on it is necessary if the ear is to be subjected to noise at a sound pressure level more than 85 decibels continuously.
4、It is necessary to protect the ear to reduce sound pressure on it if the ear is to be subject to noise at a sound pressure level more than 85 decibels continuously.
6、Higher sound pressure level (SPL) favored both collision efficiency and agglomeration kernel, so acoustic agglomeration increased in the higher-intensity acoustic field.
2、Finally figures of direction coefficient of sound pressure level are given out. Then using these figures the relationship between sound power level and sound pressure level radiated by a fan in...
1、Regularities of pressure on surface with sound pressure level and frequency are also given.
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