Biggest drawback to a pulsejet (aside from the noise) is they are not very fuel efficient
From the article:
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The company has also demonstrated its pulsejets using various different fuels: gasoline/petrol (87 Octane), kerosene-based fuel (Jet-A/JP-8), and sustainable ethanol-based biofuel (E85).
In terms of fuel efficiency, the company has demonstrated thrust-specific fuel consumption (TSFC) levels under 2.0 pounds/pounds-force per hour, which it says rivals the efficiency of more complex and expensive turbine-based engines.
Wave Engine combines its pulsejets with Full Authority Digital Electronic Control (FADEC), in which a computer controls engine performance, and this may well be key to achieving the stated levels of efficiency, as well as optimizing performance more generally.”……