Summary: Electric bicycle special sound level meter (level 1 accuracy) is used to test the speed indicator sound and sound pressure level of the horn device of electric bicycle. Conform to the standard: meet the following test requirements in gb17761-2018 "electric bicycle safety technical specification" standard: 6.1.7 speed prompt sound Electric bicycles shall have speed warning sound, which shall meet the following requirements: A) when the driving speed reaches 15km /h, continuous prompt sound is issued; B) the sound pressure level of the prompt sound shall be 55db (A) ~ 62db (A). Note: bicycle ring tone is recommended for speed indicator. Single pronunciation period can be 3 s, single pronunciation time can be about 700 ms. 6.2.3.3 honking device Electric bicycles shall be equipped with A honking device, and the sound pressure level of the honking device shall be 75 dB(A) ~ 100 dB(A). Technical parameters: Applicable standards: iec61672-1:2013 Class 2, ANSI s1.4:1983 Type 2 Measurement parameters: SPL, MaxL Measurement range: 30dB ~ 130dB Linear range: 60dB Frequency measurement range: 31.5 Hz to 8KHz Frequency weighting: A and C Time weighting: fast and slow Accuracy: + / - 1.5db (at reference sound pressure 94db@1khz) Microphone: 1/2 inch prepolarized capacitive microphone Measuring gear: each of the 5 levels must be 30-90db, 40-100db, 50-110db, 60-120db, 70-130db Digital display: 4-digit LCD, 0.1db resolution, updated every second Simulation indication: 1-db interval, 60dB display range, each 1/8 second update Display warning function: overload indicator is too low indicator (OVER the upper limit of file bit appears + UNDER symbol appears OVER the lower limit of file bit) Analog AC/DC output: 2Vrms (full scale value), 10mVDC/dB Power supply: 4 1.5v lr-6 /AA size batteries and ac converters Battery life: about 24 hours Operating temperature and humidity: - 10 ℃ to 50 ℃, R.H. < 90% unset Size: 265 (length) x 72(width) x 21(thickness)mm Weight: about 310g
Summary: Electric bicycle special sound level meter (level 1 accuracy) is used to test the speed indicator sound and sound pressure level of the horn device of electric bicycle. Conform to the standard: meet the following test requirements in gb17761-2018 "electric bicycle safety technical specification" standard: 6.1.7 speed prompt sound Electric bicycles shall have speed warning sound, which shall meet the following requirements: A) when the driving speed reaches 15km /h, continuous prompt sound is issued; B) the sound pressure level of the prompt sound shall be 55db (A) ~ 62db (A). Note: bicycle ring tone is recommended for speed indicator. Single pronunciation period can be 3 s, single pronunciation time can be about 700 ms. 6.2.3.3 honking device Electric bicycles shall be equipped with A honking device, and the sound pressure level of the honking device shall be 75 dB(A) ~ 100 dB(A).
