(1) Peak - to - peak equivalent sound pressure level.

(2) With the introduction of these methods, the gear sound pressure level can be decreased.

(3) A special ALC circuit handles very high sound pressure levels but without distortion.

(4) According to the spectra of sound pressure the predictions of the resonant bubble fraction are deduced.

(5) Combining with the national and foreign related standards, the selection of SPL (Sound Pressure Level) of sound reinforcement system is discussed in terms of technique and implement.

(6) In order to calculate the sound pressure level of noise signal, a new arithmetic of noise frequency weight, which is based on spline interpolation, is presented in this paper.

(7) Besides, the influences of sound pressure level, residence time and initial total number concentration on agglomeration were investigated.

(8) Sound Pressure Level (SPL) Sound pressure level is a measurement of the pressure fluctuations of a sound wave as it propagates through the air.

(9) With the measurement of average sound pressure level and sound power level(), the noise reduction result of the oil pan made by sandwich steel plate was proved.

(10) The sound pressure level changes acutely in shock intersection, and shocks outside nozzle and exhaust plume cause strong noise.

(11) Regularities of pressure on surface with sound pressure level and frequency are also given.

(12) Sound exposure is the combined result of sound pressure level and action time.

(13) By Combining acoustics with electrics, and based on sound pressure level a calculating method was presented to determine the magnititude of electric-power inputting to sound-box.

(14) Under the same frequency and same sound pressure level, the infrasound damage on the brain didn't show linear correlation with the acting time of infrasound.

(15) The A-weighted sound pressure level is measured with test standard for national code.

(16) The noise power, sound intensity, sound pressure, vibration acceleration and corresponding time-frequency spectrum of 6480 driver axle surface were measured and analysed.

(17) A dynamic mic , which can handle loud sound pressure levels, is the typical choice.

(18) In this paper, the sound pressure level of each frequency of NO. 5 subway line noise is presented through the long-term research on it and test data in Yonghegong Station.

(19) 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...

(20) Higher sound pressure level(SPL)favored both collision efficiency and agglomeration kernel, so acoustic agglomeration increased in the higher-intensity acoustic field.

(21) Based on the masking properties of the psychoacoustic model, we then derive the required sound pressure level of the watermark.

(22) ASW can be evenly broadened to a wide range by adjust the sound pressure level of central loudspeaker.

(23) This paper describes the principle, construction and experiments of the standard apparatus for measuring underwater sound pressure with piezoelectric dual-projector by null method in low-frequencies.

(24) Structure of digital transducer arrays and multiple voice coils, mechanism of sound pressure field, as well as other possible techniques are expressed by contrast.

(25) Built - in loop radiators, super dynamic low - frequency sound pressure.

(26) The "doublesichamber negative pressure method" in a shock tube system for high sound pressure level calibration is provided in this paper.

(27) Upbuild the signal model for ship noise, deduce the relationship between sound pressure and particle velocity in plane wave.

(28) But electrodynamic loudspeaker used extensively takes on inductance, and it is a device driven by current, its output sound pressure is proportional to current.

(29) Acoustics - Reference zero for the calibration of audiometric equipment - Part 1 : reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones.

(30) Acoustic energy generated by the power spectrum to C-type particles reduced the peak frequency, the greater the frequency of peak sound pressure smaller.

(31) AQ10 has a true natural performance of its greatest feature is lightweight and has a higher sound pressure level, it needs to meet a lot of small speakers and a small space to meet the occasion.

(32) The sound pressure at near distance under free field was computed by using the wave number integration and the basic characteristics of the radiated noise were analyzes.

(33) Combustion noise and the piston knock noise are separated by adopting sound pressure method.

(34) Methods:To measure the peak sound pressure level of impulse noise during missile firing.

(35) AQ12 has a true natural performance of its greatest feature is lightweight and has a higher sound pressure level, it needs to meet a lot of small speakers and a small space to meet the occasion.

(36) The maximum sound pressure level standards of Beijing Olympic Organizing Committee is introduced.

(37) Sound pressure level within the region significantly less than the other regions.

(38) Measurement and calculation of sound pressure level and sound power level.

(39) On the basis of lots of preliminary tests of the hydrophone, sound pressure sensitivity in the air and directivity pattern were tested as well as the ability of receiving sound signal in water.