You can clearly see the infrasonic pure tone at around 90dB, an SPL that far exceeeds the other sounds in the room. A 15hz sine tone is a good start or even better a sliding tone from 60hz down to 10hz and then back up.

It was only by chance that I heard it 15-16 years ago and I lost contact with Rob, who built it, when he moved.The modulator 15, due to the threaded connection, is installed inside the housing 1 with the possibility of movement along its axis (towards the channel 12 and vice versa). Change country: -Select- Albania Algeria American Samoa Andorra Angola Anguilla Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Republic Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia Bosnia and Herzegovina Botswana Brazil British Virgin Islands Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Islands Cayman Islands Central African Republic Chad Chile China Colombia Comoros Cook Islands Costa Rica Cyprus Czech Republic Côte d'Ivoire (Ivory Coast) Democratic Republic of the Congo Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Islas Malvinas) Fiji Finland France French Guiana French Polynesia Gabon Republic Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guam Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Honduras Hong Kong Hungary Iceland India Indonesia Iraq Ireland Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Kuwait Kyrgyzstan Laos Latvia Lebanon Lesotho Liberia Liechtenstein Lithuania Luxembourg Macau Macedonia Madagascar Malawi Malaysia Maldives Mali Malta Marshall Islands Martinique Mauritania Mauritius Mayotte Mexico Micronesia Moldova Monaco Mongolia Montenegro Montserrat Morocco Mozambique Namibia Nepal Netherlands Netherlands Antilles New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norway Oman Pakistan Palau Panama Papua New Guinea Paraguay Peru Philippines Poland Portugal Puerto Rico Qatar Republic of Croatia Republic of the Congo Reunion Romania Rwanda Saint Helena Saint Kitts-Nevis Saint Lucia Saint Pierre and Miquelon Saint Vincent and the Grenadines San Marino Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Slovakia Slovenia Solomon Islands South Africa South Korea Spain Sri Lanka Suriname Swaziland Sweden Switzerland Taiwan Tajikistan Tanzania Thailand Togo Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan Vanuatu Vatican City State Venezuela Vietnam Virgin Islands (U. A series of continuous wave (cw), constant frequency, and amplitude sine waves were broadcast according to the schedule listed in Table II.

The diaphragm at the heart of the new TORUS Series sets the industry standard both in terms of stiffness and damping. The generator provides a discrete push-pull air flow through an air pump and a vacuum pump that generate positive and negative disturbances. NOTE: Low latency setting may result in high frequencies on some devices sound inaccurate, especially on higher volume. A theory is developed that describes the acoustic radiation from the infrasound generator as the superposition of a monopole and a dipole. At low frequencies, it feels like a deeper bass note in the room, an octave below the lower of the two notes.I felt it more than heard it; the room pressurisation was so intense it made me nauseous and I've never seen or heard anything like it before or since; I think that it messed about with the balance centres of my ears as well as pulverising all my organs. The rotary subwoofer is a novel low frequency transducer capable of efficiently generating infrasound from a compact source with the ability to insonify all elements of the array from a standoff distance of 3. Topics Microphones , Acoustic phenomena , Acoustic signal processing , Acoustic transducers , Wave forms , Volcanology , Land transportation , Anthropogenic , Voice coil , Atmospheric optical phenomena I. Infrasound generator comprises a hollow body with an inlet annular channel on one of its walls for supplying compressed gas, and with an opening on the opposite wall of the body, in which a modulator is installed in the form of a cylindrical tube coaxially with the annular channel, one end of which is located opposite the annular channel and has an internal chamfer. The rotary subwoofer is a novel low frequency transducer capable of efficiently generating infrasound from a compact source.