Optimizing Speaker Performance: Understanding Audio Technology
Acoustic Short Circuit: Low-Frequency Speaker Issues
What phenomenon attenuates the sound level and causes poor performance at low frequencies? Speakers emit a sound wave from each face of their diaphragm. These waves are in phase opposition. Therefore, when the acoustic wavelength being reproduced is large relative to the speaker’s size, an acoustic short circuit occurs due to diffraction around the cone, leading to sound attenuation and poor low-frequency performance.
Understanding Speaker Baffles
Read MoreMaritime Communication Essentials: GMDSS, VHF, and Safety Protocols
Maritime Communication Fundamentals
Understanding Shipboard Communication
- What is inter-ship communication? It is communication between vessels and coast stations.
- What is intra-ship communication? It is internal communication within the ship.
Message Priorities in Maritime Communication
- What does the “Priority” of a message indicate? It indicates the importance of the message.
- When is the Priority “Distress” used? When there is serious and immediate danger for the vessel, crew, and passengers.
- When is
Digital Skills, Social Impact, and Hospitality Innovation Insights
Programming Fundamentals with Lluís Molas
This session, led by Lluís Molas, introduced the fundamental concepts of programming and its growing relevance in today’s digital world. The talk aimed to demystify how programming works, differentiate between various programming languages, and emphasize the critical importance of developing computational thinking skills. The session seamlessly blended historical context with core coding fundamentals, including loops, conditionals, and events. Practical,
Read MoreElectrical System Protection: Faults, Concepts, and Devices
Understanding Electrical Concepts & Protection
Voltage (Tension)
Voltage (V) is the electrical potential difference between two points in a circuit. It exists when there is an imbalance between two points, with one having a higher electrical potential than the other. Voltage is measured in volts. It is present in both DC (Direct Current) and AC (Alternating Current) systems, including single-phase and three-phase configurations. The relationship between voltage, current, and resistance is described
Read MoreSound Fundamentals: Digital Audio, Formats, and Production
Understanding Sound
What is Sound?
From a physical point of view, sound is a vibration that propagates in an elastic medium, whether solid, liquid, or gas. When referring to audible sound for the human ear, it is defined as a sensation received by the auditory organ, produced by vibrations propagating through an elastic medium in the form of waves.
Requirements for Sound Production
To produce sound, the following are needed:
- An issuer or vibrating body.
- An elastic medium (transmitter of these vibrations)
Maritime Voice Radiocommunications Regulations & Procedures
Voice Radiocommunications
General Provisions
Unnecessary Transmissions & Interference
Communications should be restricted to those necessary for the safe and expeditious movement of vessels. Unnecessary transmissions are not permitted.
Profane and obscene language is strictly prohibited.
False Distress Signals
False distress signals are strictly prohibited.
Penalties for Violations
Any person who knowingly transmits or causes to be transmitted any false or fraudulent distress signal, call, or message
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