UK Electronics Expert – Build Extremely High-Power Ultrasonic Dog Bark Deterrent (Through-Floor, Max Volume)

Job ID: 40006618

Budget: £250 – £750 GBP

Job Description:

I need an experienced UK-based electronics builder to design and assemble the most powerful possible ultrasonic anti-barking device for use in a first-floor flat to silence a downstairs neighbour’s dog that barks constantly from inside their ground-floor apartment. Key requirements: Purely ultrasonic output (22–28 kHz range) – must be completely inaudible to humans at full power.
Absolute maximum safe ultrasonic SPL possible with off-the-shelf parts (target 140 dB+ at source, 110–120 dB+ after penetrating a standard UK timber joist + plasterboard ceiling).
Directional horn/exponential waveguide to focus the beam straight down through the floor.
20–40 high-output 40 kHz ultrasonic piezos in parallel array (or higher-power air transducers if you have access).
High-voltage Class-D amplifier (50–200 W+ capable, 24–48 V rails) with cooling if needed.
Frequency sweep (22–28 kHz) every few seconds to prevent habituation.
Automatic bark-triggered activation (electret mic + comparator or small microcontroller).
3–5 metre cable so the horn can be placed flat on the floor while the amp/power supply sits elsewhere.
UK mains powered (240 V plug).
Must be stable and safe for continuous 24/7 operation.

I am specifically looking for the “nuclear” version – the most powerful device that can be possibly made for this purpose. The only limit is that it must remain ultrasonic and inaudible to humans. Budget is flexible for genuine maximum power device properly engineered that actually works through the floor.

Please quote: Total price including all parts, assembly, testing and postage within the UK.
Estimated dB output at source and after floor penetration. Build time.
Photos/examples of similar high-power ultrasonic projects you have done

UK builders only (for easy shipping). Happy to buy all parts myself and send them to you if that reduces cost.