Category Archives: Acoustics & Sound

Audiophile Vacuum Tube Amplifiers Volume 3

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 14.63 MB

Downloadable formats: PDF

Earn one point for every dollar you spend and use those points to save on future purchases. For the acousticians of musical instruments, a careful repeat of the 2013 measurements establishes a stark contrast between the banjo and the guitar (an other wood-topped instruments) regarding the Helmholtz resonance. For example, you need to perform signal processing, such as octave analysis on raw sound pressure signals to represent the data in a format comparable to the response of the human ear.

Continue reading Audiophile Vacuum Tube Amplifiers Volume 3

Building Physics: Acoustics

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 11.96 MB

Downloadable formats: PDF

It is analogous to the absorption of sound in air. In pressure terms, intensity is a measure of the amount of compression and rarefaction of the sound pressure wave. Osborne Reynolds suggested that the nature of the flow of a fluid depends on its density, flow rate, the dimensions of the container through which it is flowing, and its viscosity. Also note that our acoustic foams can easily be cut with any serrated knife (such as a turkey carving knife, or simply a knife with "teeth") or a good pair of industrial scissors.

Continue reading Building Physics: Acoustics

ISO 16063-22:2005, Methods for the calibration of vibration

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 8.81 MB

Downloadable formats: PDF

In Europe there are special courses to prepare a person for the position of "tonmeister," one who is trained in both music and engineering. This improved room cooling but it did not completely solve the noise problem. One of the biggest problems with generating nuclear fusion in our big terrestrial machines (like ITER, still under construction) is that the machine starts generating these plasma waves, thereby disturbing the orbits of the subatomic particles.

Continue reading ISO 16063-22:2005, Methods for the calibration of vibration

Mastering Audio: The Art and the Science

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 8.23 MB

Downloadable formats: PDF

More often than not the room you use for a studio or home theater has already been built, so knowing the modes and other permanent properties of the room is academic at best. Here I deal with free standing and floor standing speakers. A typical example would be a stud wall having two layers of 5/8 inch thick gypsum board on each side. Likewise, animal species such as songbirds and frogs use sound and hearing as a key element of mating rituals or marking territories.

Continue reading Mastering Audio: The Art and the Science

The Audiopro Home Recording Course: A Comprehensive

Format: Paperback

Language:

Format: PDF / Kindle / ePub

Size: 12.57 MB

Downloadable formats: PDF

One such example is the Hollywood Bowl in Hollywood, California. Both those fates figure in the mythology of Sayers' fictional bell, Batty Thomas, which the church sexton, Mr. Once again: Quite a few music lovers do not give the loudspeakers the attention and care they really deserve - although they think they do! The chosen trunks are cut lengthwise into four and then cut to approximately the desired length. If you recall from the previous article (Live Sound Explained: 3.

Continue reading The Audiopro Home Recording Course: A Comprehensive

Use of Microphones (Media Manuals)

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 10.03 MB

Downloadable formats: PDF

Depth without Muddiness Dry speech Note the sound is uncomfortably close Mix of dry with early reflections at -5dB. Note there is no apparent reverberation, just depth. Lloyd Smith and his graduate students at Washington State University, developed the high-speed cannon test currently used to test and certify all slow-pitch softball bats sanctioned by the Amateur Softball Association. You then want to place your speaker so they are in the configuration shown above – with the triangle closing about 1′-4″ behind the center of your head.

Continue reading Use of Microphones (Media Manuals)

Acoustics, Information, and Communication: Memorial Volume

Format: Hardcover

Language: English

Format: PDF / Kindle / ePub

Size: 6.93 MB

Downloadable formats: PDF

However, studios on a tight budget can apply rigid fiberglass in the room corners as shown in Figure 3a and lose only the small amount of space in the corners. You may have already requested this item. If ρ'c' is less than ρc, θ' will reach 90° for some angle of incidence θc less than 90°. Thirty thousand nerve fibers transmit about 340,000 values over the aural nerve to the brain, by means of electric impulses called action potentials (up to 900 Hz per fiber). Considers the more important advantages and shortcomings and the environmental impacts of aspects of wind, tidal, geothermal, and magneto-hydrodynamic power; the hydrogen economy; and nuclear power, including fusion.

Continue reading Acoustics, Information, and Communication: Memorial Volume

ISO 386:1977, Liquid-in-glass laboratory thermometers -

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 13.90 MB

Downloadable formats: PDF

The three curves (right) show the averaged distribution of energy in the sound of orchestral music (black), of ordinary speech (gray) and of the late tenor Jussi Bjorling singing with an orchestra (colored). Usually, this condition can be overcome by swallowing, or even better, by yawning. They record audio performances or events and may combine tracks that were recorded separately to create a multilayered final product. While acoustics does include the study of musical instruments and architectural spaces, it also covers a vast range of topics, including: noise control, SONAR for submarine navigation, ultrasounds for medical imaging, thermoacoustic refrigeration, seismology, bioacoustics, and electroacoustic communication.

Continue reading ISO 386:1977, Liquid-in-glass laboratory thermometers -

IEC 61143-1 Ed. 1.1 b:1998, Electrical measuring instruments

Format: Paperback

Language: English

Format: PDF / Kindle / ePub

Size: 14.64 MB

Downloadable formats: PDF

The Ultrasound interfaces are used to compute the transient propagation of acoustic waves over large distances, relative to the wavelengths. It is a very good place to record! (And it is exceptionally beautiful visually…) Example – depth perspective through mike technique: Direct sound: Early reflection: Late reverberation: Direct + Early -5dB: Direct + Early + Late -8dB: When the reverberation radius is large enough we can use an extra pair of microphones to create a single early reflection.

Continue reading IEC 61143-1 Ed. 1.1 b:1998, Electrical measuring instruments

The Foley Grail: The Art of Performing Sound for Film,

Format: Paperback

Language:

Format: PDF / Kindle / ePub

Size: 9.52 MB

Downloadable formats: PDF

As you can see, it is rigid enough that it doesn't flop over when not supported (right side of photo), but not so rigid that it can't be bent or squeezed. 703 "rigid" fiberglass is not really very rigid. In 1931 Leopold Stokowski spent 4 days at the site to determine the acoustic principals that could be applied to an open-air concert theater he was designing. These faster echoes are known as flutter echoes and are created when sound bounces back and forth between two reflective surfaces.

Continue reading The Foley Grail: The Art of Performing Sound for Film,