Doppler Effect ທີ່ໃກ້ເຂົ້າມາຄິດໄລ່ເຄື່ອງຄິດໄລ່ແຫຼ່ງຂໍ້ມູນ I want to calculate New Frequency of Approaching Source(f')Wave Velocity(v)Wavelength in Front of Source(λf) Wave Velocity(v) = m/s Wavelength in Front of Source(λf) = m New Frequency of Approaching Source(f') = Hz