Acoustic Devices, Shotgun Microphones, Parabolic Microphones, Hearing Devices, Parts, Plans Kits

Acoustic Devices

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These devices are intended to allow the user to hear sounds at a distance that would be inaudible to the unaided ear. The parabolic mikes are excellent for nature listening, especially for birds. Law enforcement uses these devices for surveillance.

Parabolic mics use a large area to gather sound energy and then focus it to a sensitive mike element and amplifier to further enhance performance. Parabolic mics gather roughly 3 times more sound than shotgun mics, but they also cover a wider area and therefore capture more background noise and aren't as good at isolating sounds from a noisy background.

Shotgun mics are more directional and are often used for sound gathering in action movies. They also are used for surveillance by law enforcement. Shotgun mics use a sensitive amplifier with a series of resonant tubes or a single tube with baffles.

Ultrasonic Receiver
Hear The Incredible World Of High
Frequency Sounds - Beyond That Detectable By The Human Ear!

Detects sounds beyond the range of human hearing, from about 25kHz-30kHz. Directional device allows you to hear and pinpoint mechanical and electrical sounds such as leaking gases, air, corona, motor friction noises, etc.

This device is not made to hear sounds that the human ear can normally perceive, but instead it will hear ultrasound beyond the range of human hearing. (To amplify normal sounds, please see our other devices below, such as the Cybernetic Ear, TurboEar, and Parabolic Bionic Ear.)

Hear bats, insects and other sounds of mother nature - even beading water!
Click HERE for actual bat sounds recorded using the HT90

View/Download Free Instructions (Adobe PDF)

HT9 - Plans (By Download - $4.00) .................................................$10.00
HT9DISH - Parabolic Dish Only .........................................................$49.95
HT9K - Kit/Plans (headsets included; dish not included) ............$99.95
HT90 - Assembled (headsets included; dish not included) .....$149.95
HT90P - Assembled with Headsets & Dish (as pictured) .........$199.95
HT90P - Rental ...................................................................................$199.95 ($50 rental / 30 days)

Great Low Cost Hearing Aid!
Cybernetic Ear

Enhances Normal Hearing 3 To 4 Times
Use for courtesy lowering of TV volume, etc.. Detect rattles, mechanical abnormalies, leaking gases, air, electrical corona. Excellent safety aid for lab or shop.

Adjustable Volume Control
Fits Into Either Ear
Long Lasting Batteries

This is not FDA apparoved as a hearing aid.

CYBEREAR - Ready to Use ......................$19.95

Hear A Distant Whisper!
Amazing Electronic Turbo Ear

Greatly Amplifies Hearing
High Quality Device
With Hi/Lo Filter
Adjustable Volume
Built In Light Indicator
Uses 1 AAA Battery
Small Size 2.75"x 1.75"x .75"

TURBO - Ready to Use ................$19.95

Hi-Fi Stereo Headset

Cushioned For Comfort
Frequency Range: 20Hz - 18,000Hz
Sensitivity: 103dB
32 Ohm Input Fits 3.5 mm or 6.3mm (1/4") Jack
Use On Our Equipment

HS20 - Hi-Fi Stereo Headset ......................$19.95

Super Sensitive
Parabolic Bionic Ear

Amplifies Normal Hearing up to 37 Times! Hear a conversation up to 100 Yards

Flashlight-sized electronics is interfaced with a 12" lightweight plastic parabolic reflector, providing over 30 db of pick up gain! The parabolic dish gathers sound and focuses it to an amplifier which further increases sensitivity, resulting in an impressive boost beyond normal human hearing. Includes headsets with adjustable volume for each ear. Runs on a 9v battery which lasts ~40 hours (not included). Field-use weight is 13 ounces (shipping weight is greater due to packaging).

BIOEAR10 - Ready to use .....................$129.95

20" Parabolic Microphone

Hunters, trackers, nature enthusiasts, and special events!

Hear conversations up to 300 yards!

Use satellite technology to focus distant sounds to an ultra high-gain/low-noise amplifier with voice enhancement. System includes separate volume high-performance headphones. Unit can be tripod mounted (tripod not included). Field-use weight is 1 pound 11 ounces (shipping weight is greater due to packaging).

20" Snap-Together Dish
High-Gain, Low-Noise FET Amplifier
Built In 3-Band Adjustable Equalizer
2 "AAA" Batteries last ~100 hours (not included)
Recording Jack and Tripod Mount
Adjustable volume for each ear
Automatic safety shutoff at 95 decibles
Carrying Case
Quick Assembly

PM5 - Parabolic Mic Plans (By Download - $3.00) ...$8.00
PM60 - Ready To Use ................................................$399.95

Optional Wireless Retrofit

Transmits picked up sounds to a standard FM radio. Great advantage when in those hostile, uncomfortable, mosquito infested swamp areas!

WM5K - Kit/Plans .......................................................$49.95

Shotgun Directional MicrophonesIntended for Long Range Nature Listening and Video Recording
The advantage of shotgun microphones is their ability to "hone in" on a sound source and reduce the amount of background noise. Many variables effect the transmission of sound at long distances -- whether the source is facing you, the air density and temperature, the amount of background noise, and of course the source volume. The ability to hear your target can be greatly effected by any one of these.

Low Cost
Shotgun Mike

Super directive pickup garners objective sound in loud environments. Shakeproof holder works as a dampening mechanism to cut case and handling noise. Uses a AA battery, 600 ohm input, 50-10,000 Hz response. With windscreen and case. Can be used with our HGA90 high gain amplifier. Can hear normal conversations from ~50-75 yards away.

SHOT50 - Built in preamplifier ............................$129.95

Best Performance

Size: 18.5 X .83"
Weight: 9 Oz.
Sensitivity: 12.6mv / 10 microbars
Power: External
Acceptance: 40 Degrees
Can hear normal conversations from ~100 yards away

SMAT815R - Best Shotgun Mic .............................$499.95

Build Your Own
Shotgun Microphone Project
also shows a Stethescopic Sound and Vibration Detector for listening through walls, etc.

Experimental device, when properly constructed allows sounds to be heard from greater distances, pick out whispers in a crowd, even faintly through windows at close range, etc.

Uses 36 Tuned Tubes
Battery Operated
Built In Voice Filter
Includes Our HGA90 High Gain Amp With Headsets

SM3 - Plans (By Download - $4.00) .................$10.00
SM3K - Kit/Plans (Tripod not Included) .........$149.95

Super Performance
Voice Amplifier Project

Ultra low noise design intended for acoustical or optical science project applications. Build in voice enhancement filter reduces unwanted background noises. Excellent circuit for directional mikes, nature listening, laser window bounce experiments, vibration detectors etc..

8 Ohm Output/3.5 mm Jack
Sensitive Cap FET Mike
On/Off Switch With Gain Control
9 Volt Battery Operation
1.5" x 5" Board - Easily Enclosed

HGA9 - Plans (By Download - $3.00) .................................$8.00
HGA9K - Kit/Plans.................................................................$39.95
HGA90 - Assembled - Housed in PVC Tube...................$79.95

Noise Curtain Generator

Neat little circuit plugs into existing stereo, radio recorder and produces a band of noise containing a wide spectrum of frequencies [white noise]. Jams microphones - Provides a soothing relaxing sound.

NC4 - Plans (By Download - $3.00) ....$5.00
NC4K - Kit/Plans ...................................$14.95
NC40 - Assembled ...............................$24.95

Orders: 603-673-6493 | Fax: 603-672-5406
Email: Sales & Orders
Email: Tech Support

Please direct inquiries and technical questions/assistance through email; you should get a response within 1 business day.
But before you do this, read the item description completely. Chances are good that you'll find the answers there.

PO Box 716, Amherst, NH 03031-0716