At the Department of Technology and Built environment at the University of Gävle there was an interest to study GNU Radio, which is an "open source radio project. The project is based on that most of the radio signal processing is made in an ordinary PC. The idea behind this degree project was that in a laptop there are several radio transmitters/receivers that takes space, generates heat and transmit in varied frequency band etcetera. All these radio transmitters/receivers could be replaced with a Software Defined Radio system. It means that one common, general radio hardware is used to different communications such as: WLAN, Bluetooth, GPRS, 3G etcetera. The waveform is generated in the software, which makes the system very flexible.

Background: From a public health perspective it is of great interest to prevent the risk of noise induced hearing loss, because in addition to hearing loss, tinnitus and sound sensitivity also may lead to other health problems. About 1,4 million people in Sweden live with some form of hearing loss and 25000 of them are children under the age of 16. Studies have shown that hearing loss among adolescents is increasing and it is often associated with sound environments in their leisure time. Lectures in hearing prevention has been conducted in schools for adolescents but have not reached the desired results. Objective: To enquire caregivers? attitude, behaviour and perceived knowledge about sound exposure and its risks.

The aim with this study is to examine how students and teachers value source criticism. Partly, this regards how teachers practice this in their teaching and how students work with it during lessons ? but also how students value source criticism in situations where the teacher not has pointed out that this topic is part of the actual assignment. Moreover, there is a focus on investigating how students who are critical of the sources take this into account in their daily lives; for example, when they surf on the Internet or when they discuss news articles or other media. This essay is based on interviews with students and teachers, using a qualitative method. The results of this study show that both students and teachers find source criticism to be of major importance.

Volvo Construction Equipment is a world leading company in construction machinery. Tomaintain the best products, development is prioritized. The master thesis regards sound reductionof the hydraulic system on a wheel loader. The background to the master thesis is asimulation made on the hydraulic system, performed autumn 2005. The result of the simulationshows that the energy of the pressure ripple is reduced when the paralleled hydraulicpumps are phase shifted and reduces each others pump pulsations.

Kandidatarbetets innehåll undersöker och diskuterar frågeställningen: ?Hur påverkas narrativet i en film genom att gestalta ljudet akusmatiskt??. Med hjälp av teorier och slutsatser från filmteoretiker så som Michel Chion, David Sonnenschein och Klas Dykhoff, har vi till kortfilmen Alla ljuger skapat en ljudläggning med fokus på narrativa ljud utanför den rörliga bilden. Vårt resultat syftar till att skapa grunden till en svensk standardisering av de existerande teorier och metoder för gestaltning av akusmatiska ljud i film. The content of this bachelor thesis examines and discusses around the question: ?How does the implementation of acousmatic sounds affect the narrative of a motion picture??.

Too high levels of noise lead to various health problems and cost society billions of SEK peryear. In this thesis we have examined a model of the A40E articulated hauler at VolvoConstruction Equipment in Braås. We have tried to reduce cabin noise in an articulated hauler,while also providing a way on how to proceed with a machine when the cabin does not measureup to the sound requirement. The best way to find leaks were with a reference source of model4205 and its speaker HP 1001 from Brüel & Kjaer in the cab and then walk around and listen towhere the reference source was more prominent. In this way, we found that the edges and theplugs were sensitive areas.

The soybean can be used in multiple ways, and its high oil content makes it suitable for extraction. Soy bean meal, a by-product of the oil extraction, is a good source of protein with a high feeding value, and is therefore used in a number of different animal feeds. Further, soy bean meal has a low production price, which is one of the reasons for the extensive export of the product. There is a great demand for vegetable-based proteins, especially in the organic production where synthetic amino acids are banned. However, the current production of soy beans is not environmentally sound and that combined with the long transport distances amplifies the need of finding a locally produced protein source.

Föreliggande uppsats har som syfte att ta reda på vilken syn elgitarrlärare på estetiska gymnasieprogram har kring förmedling av sound och utrustning och vilka metoder de tillämpar för att lyfta fram dessa moment i sin undervisning. Sound kan definieras på många sätt, men i detta arbete har det en innebörd av vilka klanger som olika instrument, förstärkare och diverse hjälpmedel kan producera. Målet är att ge nuvarande och blivande instrumentpedagoger en inblick i hur elgitarrlärare arbetar med dessa moment i undervisningen idag. Förhoppningen är även att studien ska kunna ge inspiration till att utveckla metoder och finna redskap som hjälper elever att skapa ett eget sound. Datamaterialet består av intervjuer med fem elgitarrlärare samt observationer av tre av dessa lärares gitarrlektioner.

Kandidatarbetets innehåll undersöker och diskuterar frågeställningen: ?Hur påverkas narrativet i en film genom att gestalta ljudet akusmatiskt??. Med hjälp av teorier och slutsatser från filmteoretiker så som Michel Chion, David Sonnenschein och Klas Dykhoff, har vi till kortfilmen Alla ljuger skapat en ljudläggning med fokus på narrativa ljud utanför den rörliga bilden. Vårt resultat syftar till att skapa grunden till en svensk standardisering av de existerande teorier och metoder för gestaltning av akusmatiska ljud i film. The content of this bachelor thesis examines and discusses around the question: ?How does the implementation of acousmatic sounds affect the narrative of a motion picture??.

Detta examensarbete handlar om hårdrockssångares medvetenhet när det gäller sångteknik. Syftet med arbetet är att få kunskap om vilka tillvägagångssätt de har använt sig av när de skapat sitt sound och hittat sin teknik. Den teoretiska utgångspunkten för studien är det sociokulturella perspektivet. Tidigare forskning inom området behandlar traditionell röstlära, mer moderna sångskolor och socialkulturella normer gällande inlärning. Jag har använt mig av den kvalitativa forskningsintervjun som metod och mina informanter är verksamma inom området.

Purpose: To examine the hearing environment for tattoo artists regarding occupational noiseand to see whether tattoo artists are exposed to hazardous noise according to Swedish WorkEnvironment Authority regulations. Method: Using a dosimeter we measured a total ofseven sessions of approximately one hour on seven different subjects, located on five studiosin Gothenburg. As a complement we did also hand out surveys based on twelve questions toexamine habits, experienced sound environment and to see if there were any hearing relatedpatterns. Results:. Sound level measurements showed that the lower exposure action valueLpAeq,8h 80 dB(A) in one case was reached if applied to the average working time of sixhours.

Open source is growing outside the boundaries of hackers, amateurs and software development, creating a humongous potential in many different areas and aspects of society. The intrinsic and extrinsic motivations that drives open source have been in the subject of much research recently, but how they affect each other when paid and unpaid contributors come together is still hidden in obscurity. In this study I investigate how intrinsic and extrinsic motivation correlates with each other and how those correlations affect paid and unpaid open source software contributors. The literature synthesis is based on of systematic reviews through searches in library databases, identification of articles by searching on the Internet and by reading relevant books. My results indicate that intrinsic and extrinsic motivations continuously affect each other and that paid contributors are more vulnerable since their extrinsic motivation in terms of money is reached only when many other motivations are fulfilled.

Syftet med denna undersökning är att erhålla relevanta frågeställningar som ska utgöra engrund för att ge en rekommendation på en pedagogisk Open Source-programvara som stödjere-learning. En utvärderingsmodell skapas för att få fram ett relevant resultat baseras på svarenpå dessa frågeställningar. Utvärderingsmodellen tillämpas i en fallstudie för att visa enpraktisk användning av modellen. Det framgår vad som är relevant att tänka på vidinförskaffande av en Open Source-programvara som ska vara så pedagogisk som möjligt..

Tinnitus is the perception of sound in the absence of an external source. 10-15 % of the population is experiencing tinnitus. There are different causes such as damage to the inner ear, musculartension and stress. Tinnitus affects many different aspects of an individuals life and often disturbs everyday activities. There are different treatments for tinnitus.

Today's urban centers become denser, which contributes to higher demands on sound and noise. It is therefore highly relevant to build homes with good sound environment while maintaining living space. This thesis aimed to reduce the current concrete walls and see how the mass law affects the reduction index value and flanking transmissions. Handmade calculations were calculated according to the Swedish standard SS-EN 21354-1, where only air sound was calculated.Calculations we­­­re performed on wall elements with different weights and thicknesses, and compared with results from Bastian.In Bastian calculations of flanking transmissions were also made, this was made to see the impact of the flanking transmission when changing the mass per unit area. Mass law's impact was examined by flanking transmission and the result shows that they are not affected as long as the ratio between the thickness and the density remains the same.A questionnaire survey was conducted to determine the actual sound experience; this questionnaire was conducted on three concrete buildings in Växjö.