Aquarian Audio Products H2B 사용자 설명서
{카테고리_이름} Aquarian Audio Products H2B에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Aquarian Audio Products H2B 2 페이지. Hydrophone
페이지 인쇄Thank you for purchasing your Aquarian Audio Products H2b hydrophone. This hydrophone is
designed to provide high-quality audio performance in a low-cost device. It is very durable and will
interface directly with ECM-type consumer microphone preamps. It offers very good sensitivity and low
noise in the human auditory range. The H2b's small size, hydrodynamic shape, rugged build, and solid
1/4" NPT mount make it an ideal hydrophone for many long-term installations.
Using the H2b
The H2b offers a very simple solution to your underwater listening needs. It incorporates a
matched sensor and FET buffer preamplifier assembly that produces an output electrically equivalent to
electret-condenser microphones. This style of microphone is the most common type used with consumer
electronics, making the H2b an extremely versatile hydrophone. Examples of equipment with which the
H2b can be used include: minidisc, tape and flash recorders, camcorders, computers, wireless lavaliere
microphone transmitters, and many telephone and two-way radio transmitters. Any device with a 3.5mm
(mini) microphone jack is very likely to be compatible with the H2b. Many audio devices with 2.5mm
microphone or headset jacks, or professional microphone preamplifiers with phantom-powered XLR or
TRS inputs, can also be used with the H2b and the appropriate patch cable.
The H2b requires bias power from the device with which it is used. It is very unlikely that you can
harm the hydrophone or the device with which it is used by simply connecting each device with a standard
3.5mm TRS (stereo mini) patch cable and trying it. If it is working, you will easily hear handling noise and
close speech. If it does not appear to work correctly, check the documentation for the device used with
the H2b and ensure that it does supply bias power. This is often referred to as plug-in or plug-and-play
power. It may be absent or need to be switched on. If, for instance you are using a video camera that
requires a battery in its normal microphone, it is likely that bias power is not available from that device.
Conversely, if you can plug a microphone in that does not need its own battery, and that microphone
works correctly, your H2b should work equally well. Also check for gain adjustments and increase gain if
needed.
Mounting and Electrical Connection
The H2b uses a standard (ANSI) 1/4" male pipe thread for mounting. Many common types of
fittings are available at your local hardware store. If you are mounting directly to a hull, tank wall, or
equipment housing, drills and taps are also commonly available. Use a 7/16-inch (0.438", 11.1mm) tap
drill and take care to align your tap with the hole, cutting threads only as deep as required. Note that pipe
threads are tapered. It is possible to run a pipe tap too deep, making the H2b bottom out on the flats of the
mount before the threads bind snugly into the mounting hole.
CRITICAL NOTES:
A thread sealing compound is required! We will not be liable for damage caused by leaks.
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Liberal use of a below-waterline marine-quality sealant is recommended.
Do not apply force to the black surfaces of the hydrophone during installation. Use a 9/16" or
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14mm open-ended wrench to firmly tighten the hydrophone into its mounting hole.
The mounting stem of the H2b is connected to signal ground. If you are mounting the hydrophone
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to a metal pipe or surface, ensure that the mounting surface is not connected to any voltage
potential other than your preamp signal ground. Noise can be caused by having multiple ground
paths between the hydrophone and preamp. If you are grounding the H2b through it's mounting
surface, it may be beneficial for you to disconnect the ground (sleeve terminal) at the mating plug.
Aquarian Audio Products
H2b Hydrophone User's Guide