Police Siren Sound Naa Songs Download

So ages ago I noticed that Roy Wood's "Goin' Down the Road (A Scottish Reggae Song)" and Thunderthighs' "Central Park Arrest", which both have police sirens, both peaked in the UK charts at the same time in early July 1974*, and the latter song was written by Lynsey de Paul, who was Roy Wood's girlfriend at the time. And Roy appeared on Lynsey's "Ooh I Do", released a few weeks before those singles! Did they conspire to get two police sirens into the charts at once?

Nowadays, sirens are considered the first sign of impending danger, as much as sending warning signals to alert the public. In movies, they enhance the scene and drive the audience to take notice and be ready for the next action or horror scene. Using police siren sound effects also helps deliver information and evoke an emotional response. Take a look at our selection of top police siren sounds to add to your short film or social media video projects.

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Intense and powerful, this set of 4 police siren sound effects is a perfect match for police/ambulance/firefighter sirens in your movies. Quickly drop them onto your timeline when editing your next animations, fast chases, robbery scenes, or emergencies.

Breathe more life into your next action scenes with this useful set of 4 police siren sound effects, including longer and shorter versions. Import them and add them as ambient background sounds for motorcycle or car accidents.

Some chase scenes will feature sections that require a specific set of sounds. The Police Siren Inside And Outside is a great pack of 3 police siren sound effects focusing on slightly muffled internal siren sounds or a car chase passing by. It fits right in when you need a background sound for police radio conversations.

Featuring loud police sirens, combined with the sounds of emergency vehicles, this pack creates a complete accident scene. With 4 different versions, you can mix any sound to depict different vehicles approaching and create additional realistic ambient detail.

This is a more classic siren sound effects pack, featuring 7 different short versions that can be used in many police and ambulance emergency scenes. These amazing sounds suit your movies, trailers, video games and animations. You can even use them as a transition in your podcasts!

This pack of 5 wailing siren sound effects will add alarming intensity to your accident or crash scenes as emergency help arrives. Definitely, a must-have in your editing arsenal to help you create more authentic scenes that enhance the production quality.

Add unique background sounds of cars and police sirens wailing to your scenes with authentic police radio chatter. Using this longer ambient sound effect, you can cut and edit the soundtrack in different sections to amplify cinematic openers, trailers, and action teasers.

Show your audience what to see and feel using sirens in your scene. From an intense horror scene that will either end well or go horribly wrong to a classic action scene where the thief is chased around back streets by the police. Royalty-free sound effects are a great way to enhance and make your film feel more realistic. So download these popular selections and get to editing your next short film like a pro!

A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire engines. There are two general types: mechanical and electronic.

Many fire sirens (used for summoning volunteer firefighters) serve double duty as tornado or civil defense sirens, alerting an entire community of impending danger. Most fire sirens are either mounted on the roof of a fire station or on a pole next to the fire station. Fire sirens can also be mounted on or near government buildings, on tall structures such as water towers, as well as in systems where several sirens are distributed around a town for better sound coverage. Most fire sirens are single tone and mechanically driven by electric motors with a rotor attached to the shaft. Some newer sirens are electronically driven speakers.

In 1819, an improved siren was developed and named by Baron Charles Cagniard de la Tour.[4] De la Tour's siren consisted of two perforated disks that were mounted coaxially at the outlet of a pneumatic tube. One disk was stationary, while the other disk rotated. The rotating disk periodically interrupted the flow of air through the fixed disk, producing a tone.[5][6] De la Tour's siren could produce sound under water,[7] suggesting a link with the sirens of Greek mythology; hence the name he gave to the instrument.[8]

To direct a siren's sound and to maximize its power output, a siren is often fitted with a horn, which transforms the high-pressure sound waves in the siren to lower-pressure sound waves in the open air.

The pneumatic siren, which is a free aerophone, consists of a rotating disk with holes in it (called a chopper, siren disk or rotor), such that the material between the holes interrupts a flow of air from fixed holes on the outside of the unit (called a stator). As the holes in the rotating disk alternately prevent and allow air to flow it results in alternating compressed and rarefied air pressure, i.e. sound. Such sirens can consume large amounts of energy. To reduce the energy consumption without losing sound volume, some designs of pneumatic sirens are boosted by forcing compressed air from a tank that can be refilled by a low powered compressor through the siren disk.

In United States English language usage, vehicular pneumatic sirens are sometimes referred to as mechanical or coaster sirens, to differentiate them from electronic devices. Mechanical sirens driven by an electric motor are often called "electromechanical". One example is the Q2B siren sold by Federal Signal Corporation. Because of its high current draw (100 amps when power is applied)[citation needed] its application is normally limited to fire apparatus, though it has seen increasing use on type IV ambulances and rescue-squad vehicles. Its distinct tone of urgency, high sound pressure level (123 dB at 10 feet) and square sound waves account for its effectiveness.

In Germany and some other European countries, the pneumatic two-tone (hi-lo) siren consists of two sets of air horns, one high pitched and the other low pitched. An air compressor blows the air into one set of horns, and then it automatically switches to the other set. As this back and forth switching occurs, the sound changes tones. Its sound power varies, but could get as high as approximately 125 dB, depending on the compressor and the horns. Comparing with the mechanical sirens, it uses much less electricity but needs more maintenance.

In a pneumatic siren, the stator is the part which cuts off and reopens air as rotating blades of a chopper move past the port holes of the stator, generating sound. The pitch of the siren's sound is a function of the speed of the rotor and the number of holes in the stator. A siren with only one row of ports is called a single tone siren. A siren with two rows of ports is known as a dual tone siren.By placing a second stator over the main stator and attaching a solenoid to it, one can repeatedly close and open all of the stator ports thus creating a tone called a pulse. If this is done while the siren is wailing (rather than sounding a steady tone) then it is called a pulse wail. By doing this separately over each row of ports on a dual tone siren, one can alternately sound each of the two tones back and forth, creating a tone known as Hi/Lo. If this is done while the siren is wailing, it is called a Hi/Lo wail. This equipment can also do pulse or pulse wail. The ports can be opened and closed to send Morse code. A siren which can do both pulse and Morse code is known as a code siren.

Electronic sirens incorporate circuits such as oscillators, modulators, and amplifiers to synthesize a selected siren tone (wail, yelp, pierce/priority/phaser, hi-lo, scan, airhorn, manual, and a few more) which is played through external speakers. It is not unusual, especially in the case of modern fire engines, to see an emergency vehicle equipped with both types of sirens. Often, police sirens also use the interval of a tritone to help draw attention. The first electronic siren that mimicked the sound of a mechanical siren was invented in 1965 by Motorola employees Ronald H. Chapman and Charles W. Stephens.[12]

Steam whistles were also used as a warning device if a supply of steam was present, such as a sawmill or factory. These were common before fire sirens became widely available, particularly in the former Soviet Union. Fire horns, large compressed air horns, also were and still are used as an alternative to a fire siren. Many fire horn systems were wired to fire pull boxes that were located around a town, and this would "blast out" a code in respect to that box's location. For example, pull box number 233, when pulled, would trigger the fire horn to sound two blasts, followed by a pause, followed by three blasts, followed by a pause, followed by three more blasts. In the days before telephones, this was the only way firefighters would know the location of a fire. The coded blasts were usually repeated several times. This technology was also applied to many steam whistles as well. Some fire sirens are fitted with brakes and dampers, enabling them to sound out codes as well. These units tended to be unreliable, and are now uncommon.[citation needed]

Mechanical sirens blow air through a slotted disk or rotor. The cyclic waves of air pressure are the physical form of sound. In many sirens, a centrifugal blower and rotor are integrated into a single piece of material, spun by an electric motor.

The frequency, i.e. the cycles per second of the sound of a mechanical siren is controlled by the speed of its rotor, and the number of openings. The wailing of a mechanical siren occurs as the rotor speeds and slows. Wailing usually identifies an attack or urgent emergency. 006ab0faaa