Subject: hydrophones (fwd)

Mike Williamson (pita@www1.wheelock.edu)
Fri, 12 Dec 1997 13:59:13 -0500 (EST)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                      J. Michael Williamson
Principal Investigator-WhaleNet <http://whale.wheelock.edu>
                   Associate Professor-Science
  Wheelock College, 200 The Riverway, Boston, MA 02215
             voice: 617.734.5200, ext. 256
            fax:    617.734.8666, or 978.468.0073

"Follow in my wake, you've not that much at stake,
For I have plowed the seas, and smoothed the troubled waters"
                        Jimmy Buffett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---------- Forwarded message ----------
Date: Thu, 11 Dec 1997 05:09:46 -0800
From: MARMAM Editors <marmamed@UVic.CA>
Reply-To: Marine Mammals Research and Conservation Discussion
     <MARMAM@UVVM.UVIC.CA>
To: MARMAM@UVVM.UVIC.CA
Subject: hydrophones

Thanks to all who offered suggestions of where to find hydrophone
information.  We have compiled the following from various websites
and messages that we received, and will send this in response to=20
any hydrophone inquiries to the MARMAM list. =20

Please send any comments to marmamed@uvic.ca

MARMAM editors
marmamed@uvic.ca


The following is a compilation of hydrophone manufacturers or providers.
     MARMAM editors

---------------------------------------------------------------------
Web-sites - compilations and reviews

    http://tursiops.nus.edu.sg/datahy.html
    http://members.aol.com/jblue46498/hydrphns.htm
---------------------------------------------------------------------

(from http://tursiops.nus.edu.sg/datahy.html - the National=20
University of Singapore's Dolphin Study Group website..)

Utility-Grade Hydrophone Manufacturers:

BIOACOUSTICS
3 noyes Avenue, Mattapoisett, MA 02739, USA.
Phone: (508) 758-4270

BURNS ELECTRONICS:
Email: duncan@prodata.com.au
URL: http://www.fastlink.com.au/subscrib/roblin/catalog1.html

CETACEAN RESEARCH TECHNOLOGY
Joseph R. Olson
7309 26th Ave. NW, Seattle, WA 98117, USA.
Tel: (206) 706 6989
Email: cetacean@eskimo.com
URL: http://www.eskimo.com/~cetacean/

OFFSHORE ACOUSTICS
5454 Indian River Drive, North Vancouver, B.C., Canada V7G IL3
Phone: (604) 929 0440; Fax: (604) 983 0691
Email: jkford@interchange.ubc.ca

SEA SYSTEMS CORPS.
PO Box 1759 Friday Harbor, WA 98 250, USA.
Fax: (360) 378 38 64
Email: seasys@pacificrim.net

SENSOR TECHNOLOGIES
P. O. Box 97, Collingwood, Ontario, Canada L9Y 3Z4
Phone: (705) 444 1440; Fax: (705) 444 6787

SONATECH, Inc.
879 Ward Drive, Santa Barbara, CA 93111-2920, USA.
Phone: (805) 683 1431 ext. 353; Fax: (805) 683 4862
Email: norris@sona8.sonatech.com

SPECIALTY ENGINEERING:
3155 North Porter St., Soquel, CA 95073-2217 USA.
Phone: (408) 465 9000; Fax: (408) 465 9001
Email: selfridge@ultrasonic.com
URL: http://www.ultrasonic.com/Products/hydros.htm

VEMCO
100 Osprey Drive, Shad Bay, Nova Scotia, Canada B3T 2C1
Phone: (902) 852 3047; Fax: (902) 852 4000
E-mail: support@vemco.com
URL: http://www.vemco.com

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Professional hydrophone manufacturers:

BENTHOS
49, Edgerton Drive, North Falmouth, MA 02556-2826, USA.
Phone: (508) 563 1000 / 1 800 446 1222; Fax: (508) 563-6444
Email: info@benthos.com
URL: http://www.benthos.com

BRUEL & KJAER
Head-office:
Br=FCel & Kj=E6r Danmark A/S, Skodsborgvej 307, DK-2850 N=E6rum
Phone: +45 4580 0500; Fax: +45 4580 1405
Email: info@bk.dk
URL: http://www.bk.dk
USA: Phone: 1 800 332 2040; Fax: (770) 808 7818; E-mail: info@bk.dk;
URL: http://www.bk.dk

EDO ACOUSTIC PRODUCTS:
2645 South 300 West, Salt Lake City, Utah 84115-2968, USA.
Phone: (801) 486 7481; Fax: (801) 484 3301
E-Mail: sales@edoipd.com
URL: http://www.edocorp.com/indust/acoustic/products/acouprod.html

ENGINEERING ACOUSTICS
Engineering Acoustics, Inc., 1490 Gene Street, Winter Park, FL 32789,
USA
Phone: (407) 645 5444; Fax: (407) 645 4910=20
E-mail: ensign@eaiinfo.com=20
URL: http://www.eaiinfo.com

GEC MARCONI
Faraday Park, Railway Road, Meadowbank NSW, 2114 Australia
Sonar and Underwater Division Sensors Unit:
Phone: 612 809 9777; Fax: 612 809 9751
Email: ajdeac@gecms.com.au

GEO SPACE
7334 N. Gessner, Houston, Texas 77040, USA.
Phone: (713) 939 7093; Fax: (713) 937 8012
Email: geospace@worldnet.att.net

GRAS
Scan Tec:
Phone: (301) 495 7738; Fax: (301) 495 7739

HIGH TECH, INC.:
1390 29th Avenue, Gulfport, Mississippi 39501
Phone: (601) 868-6632; Fax: (601) 868-6645
Email: hightechinc@worldnet.att.net

ITC
869 Ward Drive, Santa Barbara, California 93111, USA.
Phone: (805) 683 2575; Fax: (805) 967 8199

RESON
Reson, Inc., 601, Firestone Road, Goleta, CA 93117, USA.
Phone: (805) 964 6260; Fax: (805) 964 7537
E-mail: sales@reson.com
URL: http://www.reson.com

SONIC TECHNOLOGIES
2935 Byberry Rd., Hatboro, Pa. 19040, USA.
Phone: (215) 957 2352 / 1 800 761 2828; Fax: (215) 957 2355
E-Mail: sonic@sonictech.com
URL: http://www.sonictech.com/sonictech.html

USRD (Underwater Sound Reference Division)
Underwater Sound Reference Division (USRD) of the Naval
Undersea Warfare Center (NUWC)
Newport, Rhode Island
Phone: (401) 841 43 36 Fax: (401) 841 49 89=20
Email: jenneke@am.npt.nuwc.navy.mil
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D


The following are some comments from MARMAM subscribers:

CETACEAN RESEARCH TECHNOLOGY
From: "Joseph R. Olson" <cetacean@eskimo.com>

=2E.You may notice that I've added a new hydrophone (model C20b).  It is 4d=
B
more sensitive than the C20a and has a bandwidth of 22kHz.  This model,
with additional headphone driver, will soon be available in retail marine
supply stores.  The price should be in the US$425 range.=20

As demands on my time increase with more hydrophone orders, I have less
time to work at my consulting job.  Earnings from consulting have
subsidized the cost of building hydrophones.  Consequently, the hydrophone
prices will increase slightly beginning 1 November 1997.  Nonetheless, I
will continue to offer discounts to research, educational, and nonprofit
organizations.  The only exception could be with the "C20b with headphone
driver."  It will be considered a recreational hydrophone (though still
well suited for research) and go by some catchy trade name.  I need to
keep the retail dealers happy.=20

Thanks again for all of your encouragement.  Please contact me if you have
any questions or comments.  I will reply to all messages when I return
home from my honeymoon on 24 September!=20
Best wishes to all,
Joe
--------------------------------------------------------------------
Date:         Thu, 5 Jun 1997 17:27:17 -0700
From:         Harald Jurk <jurk@zoology.ubc.ca>

Due to a number of requests for affordable hydrophones that are suitable
for fieldwork I thought I post the information about the hydrophones
we use for killer whale research. The hydrophones are build by Berverly
Ford's one person company called Offshore Acoustics.

The information posted is taken from the company's brochure:
Offshore Acoustics hydrophones offer high performance, field durability,
and low cost.   Their broad frequency response and high sensitivity make
them well suited for a wide range of underwater monitoring applications,
from basic listening with an amplified loudspeaker to recording using
audio cassette, DAT, or video cam-corders.  Standard hydrophones come
with 10 meters of rubber-encased coaxial cable, which is optimal for use
from a drifting boat.  Longer cable lengths for use in fixed shore-based
systems are also available.   Each hydrophone is supplied with a plastic
power supply box (12 x 6.5 x 3.5 cm) containing a 9 volt battery that
drives the hydrophoneUs internal preamplifier.   This is fitted with a
standard 3.5 mm mini-plug for connection of the unit to an amplified
speaker or recorder.

Specifications:

Nominal sensitivity             -154 dBV/uPa  +/- 4 dB at 100 Hz
Directional characteristics     Omnidirectional
Maximum operating pressure      500 psi
Operating temperature range     0 Celisius to +35 Celsius
Storage temperature range       -40 Celsius to +71 Celsius
Dimensions, hydrophone element  3.5 cm x 7 cm
Total weight                    1 kg (including cable & power supply box)
Frequency response curve        6 Hz to 14 kHz 1 3dB, 5 Hz to 40 kHz 1 10dB

1996 Prices (Canadian dollars):

Standard hydrophone system with 10m cable and power supply box  $460.00
Optional mini speaker amplifier (with battery)                  $27.00
Extra cable length                                              $4.00 per m=
etre
Postage and Handling                                            $10.00

An instruction and maintenance sheet is included.  Delivery time is 4-6
weeks.  Each hydrophone comes with a one year replacement warranty (cable
damage excluded).

You can send a Fax to Beverly Ford. Her Fax number is (604)
929-0440, or you can send a regular letter to 5454 Indian River
Drive, North Vancouver, B.C., Canada V7G 1L3. You also could get in
touch with her by e-mail. The address is jkford@interchange.ubc.ca

----------------------------------------------------------------------
From: zbinden@wild.unizh.ch (Dani Zbinden)
A manufacturer who builds affordable high-quality hydrophones is
Sonatech, Inc.

Wide band hydrophone model 8178: Piezoceramic spherical sensor with a
preamplifier on a 75 foot waterblocked cable. Specifications:

Nominal sensitivity             -170 dB re 1V/uPa  +/- 3 dB
Directional characteristics     omnidirectional in the horizontal plane
                                wide toroidal in the vertical plane above 3=
0 kHz
Maximum operating pressure      35 bar
Dimensions, hydrophone element  2 in x 7 in (including pream)
Total weight                    8 kg (including 75 feet cable)
Frequency response              10Hz - 190kHz +/- 3 dB, 5Hz - 200kHz +/- 6d=
B
Pream noise level               2 nv/(HZ)1/2
Price (1997)                    500 US$

A different hydrophone from Sonatech, model 8185, goes to about
45kHz with a very uniform frequency response. However, this
hydrophone picks up every movement of its cable, so is awkward to use
in conditions other than flat calm.The high-frequency hydrophone
(model 8178), while its response is a bit more lumpy, is much more
usable since it is very resistant to acceleration noise. This
wide-band hydrophone is also available in a towed body shape or in a
full ocean depth capable configuration.

The cable is a neoprene jacketed water blocked twisted shielded pair and
can be anything from 20 to 350 feet. Cable length above 75 feet requires a
line driver power amplifier and will increase the costs of the hydrophone.
Don will tailor the hydrophone to your particular needs without including
any design or tooling costs. In addition, he will recalibrate the unit
periodically for the cost of freight and provide calibration data about
receiving sensitivity and beam patterns.

-------------------------------------------------------
From: norris@sonatech.com (Don Norris)

BIOMON in Santa Barbara, CA. will tailor hydrophones for a specific need
without non recurring engineering charges and for a low overall cost on the
unit. Additionally, BIOMON will consult on the net for free or for short
periods of time on the phone or FAX for free. These hydrophones include
towed wideband and narrowband hydrophones, overside or suspended
hydrophones, hull mounted hydrophones, hydrophones for further mounting,
directional hydrophones, some line arrays, and projectors. Biomon address
is:

BIOMON
718 C West Victoria Street
Santa Barbara, CA. 93101
Phone:  (805) 683-1431 EXT 353
email:  norris@sona8.sonatech.com

Very Resp.   Don Norris

Don Norris
Senior Transducer Engineer
Sonatech, Inc.
879 Ward Drive
Santa Barbara, CA 93111-2920
(805) 683-1431 ext 353 Phone
(805) 683-4862 FAX



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