Waterproof Ultrasonic Speaker 36KHz 5140 Audio Mouse Repellent Bird Repellent Buzzer Price in Sri Lanka

The Waterproof Ultrasonic Speaker 36KHz 5140 Audio Mouse Repellent Bird Repellent Buzzer is an industrial-scale, high-intensity piezoelectric acoustic emitter designed for wide-area pest deterrence, agricultural crop protection, bird scaring, and automated animal repellent systems. Centered at an ultrasonic resonant frequency of 36 kHz (with high-output frequency coverage spanning 25 kHz to 50 kHz), it operates in the specialized acoustic spectrum that causes acute sensory disruption in bats, rodents, ticks, and avian pests while remaining completely silent to the human ear. Built in an oversized 5140 horn profile with an integrated aluminum vibrating diaphragm, sealed acoustic chamber, and weather-resistant polymer housing, this high-decibel transducer is engineered for outdoor perimeter installations, grain elevators, airfields, orchards, and solar plants.

Specifications

• Model / Series: 5140 Piezoelectric Ultrasonic Horn Speaker
• Operating Acoustic Function: Directional Ultrasonic Emitter / High-Decibel Acoustic Repeller
• Center Resonant Frequency: 36 kHz (±3 kHz nominal resonance)
• Broadband Operating Range: 25 kHz to 50 kHz (Optimized for wide-spectrum frequency sweeps)
• Sound Pressure Level (SPL): ≥ 95 dB to 115 dB at 10 cm / 1 m (Driven at 12V to 24V AC peak-to-peak)
• Rated Continuous Drive Voltage: 5.0 Vrms to 18.0 Vrms
• Maximum Drive Voltage: Up to 35.0 Vp-p Max. (Square wave / Push-pull drive)
• Transducer Element: Heavy-Duty Circular Piezoelectric Ceramic Disc Element
• Static Capacitance: Approx. 16,000 pF to 26,000 pF (at 1 kHz / 1V)
• Impedance: Approx. 250 Ω to 750 Ω (at resonant frequency)
• Dispersion Angle: Approx. 60° to 80° Directional Horn Beam Profile
• Ingress Protection Rating: IP65 Weatherproof / Rain-Resistant & Dust-Sealed Construction
• Operating Temperature Envelope: -25°C to +75°C
• Storage Temperature: -30°C to +85°C
• Terminal Connections: 2 × Solder Lugs / 2-Wire Insulated Flying Leads (Non-polarized capacitive load)
• Housing Construction: High-Impact UV-Stabilized ABS / PBT Outer Enclosure with Aluminum Acoustic Diaphragm
• Physical Dimensions:
  • Outer Diameter: Approx. 51.0 mm (Standard 5140 large-format rim)
  • Overall Height / Depth: Approx. 18.0 mm to 22.0 mm
• Net Weight: Approx. 16.5 g to 21.0 g

Features

• High-Pressure 36kHz Ultrasonic Emission: Targets the high-frequency auditory thresholds of bats, small rodents, and nuisance birds with intense sound pressure levels (>105 dB), inducing avoidance behavior without chemical poisons.
• Enlarged 5140 Acoustic Horn Profile: The 51mm wide radiating aperture maximizes electro-acoustic conversion efficiency and extends directional sound throw over longer distances compared to smaller 25mm or 38mm buzzers.
• IP65 Sealed Weatherproof Enclosure: Fully sealed front radiating face and bonded rear terminals withstand torrential rain, high humidity, dust storms, and outdoor condensation.
• Low Reactive Power Draw: Operates as a capacitive element rather than an inductive magnetic coil, drawing minimal average current and enabling solar panel and battery-backed field deployments.
• Frequency Modulation & Chirp Ready: Handles fast frequency ramps, ultrasonic pulse trains, and chaotic sweeps (e.g., 28 kHz to 42 kHz) without mechanical coil degradation or voice-coil burnout.

Common Applications

• Agricultural Orchards & Vineyards: Repelling fruit-eating birds, bats, and tree-climbing rodents across commercial fields and greenhouse perimeters.
• Airport & Solar Farm Bird Mitigation: Deployed along solar panel arrays, runways, and hangars to prevent birds from roosting, nesting, and depositing corrosive droppings.
• Industrial Grain Silos & Food Warehouses: Creating broad-spectrum acoustic barriers to deter rats and mice in flour mills, seed storage sheds, and distribution hubs.
• Commercial Building Eaves & Rafters: Mounted under warehouse canopies, loading docks, and balcony eaves to stop pigeon and swallow infestations.
• Perimeter Security & Wildlife Deterrence: Solar-powered boundary stakes used around fish ponds, chicken coops, and cattle feedlots to discourage nocturnal predators.

Usage Tips

• Driver Circuit Architecture (CRITICAL):
  • Do NOT connect this unit directly to a DC power supply or battery terminal. Direct DC current will not produce sound and may damage the internal ceramic disc.
  • Drive the speaker with an AC square wave or push-pull PWM signal centered around 32 kHz to 40 kHz generated by a microcontroller (Arduino, ESP32, STM32) or a dedicated 555 astable timer circuit.
  • To extract full 110dB+ sound pressure, power the speaker using an H-bridge motor driver (e.g., L298N, TC4427 MOSFET driver, or discrete complementary transistors) running on 12V to 24V DC to deliver a full 24V–48V peak-to-peak voltage swing across the capacitive element.
• Dynamic Sweep Patterns (Preventing Pest Immunity):
  • Rodents and birds rapidly habituate to steady single-tone ultrasonic signals.
  • Program your microcontroller firmware to execute continuous frequency sweeps (e.g., 28 kHz → 40 kHz → 32 kHz over a 3-second cycle), combined with randomized 500 ms bursts of varying duty cycle, to maintain long-term repellent efficacy.
• Acoustic Line-of-Sight & Surface Reflection:
  • High-frequency 36kHz waves travel along direct lines of sight and cannot penetrate concrete walls, solid wooden doors, or glass.
  • Sound reflects off hard surfaces (stone, metal, brick) while soft insulation, fabrics, and dense foliage absorb energy. Mount the speaker horn aimed directly into open flyways, entry ducts, or along walls where pests travel.
• Mounting Angle & Drainage:
  • Although the front face is water-resistant, mount the speaker tilted slightly downward (15° to 30°) beneath a protective shelter or bracket.
  • This prevents standing rainwater from gathering inside the conical horn basin, which would otherwise dampen acoustic output until evaporated.
• Pet & Wildlife Notice: While 36 kHz is well outside human auditory detection, animals such as dogs, cats, and domestic rodents can hear into this ultrasonic register. Do not deploy high-power 36 kHz emitters in enclosed indoor rooms where household pets are kept.