Recent content by classicswiss

  1. C

    Trig type question -- Speed of sound in water and in air

    unsure
  2. C

    Acoustics type question on reflection....

    Hi, hopefully someone can help with showing me how I can work this one out as I am new to the topic area and a bit stumped. A piece of machinery is emitting a sound power level of 100 dB at 40 kHz. Calculate the level of the return signal after reflection from a wall 5 m away using the...