Early artificial reverberation access method is to use an open-sounding room, namely to build a long reverberation time of room, the place such as metope, ceiling is reflection ability of building materials. To strengthen the reflection effect, some some curved diffuser is device.

For change of reverberation reverberation effect, can be in indoor rotating or increase or decrease sound-absorbing insulation materials, path, or the strength to change the reflection. Open-sounding room must be the same as studio, the studio noise isolation from the outside world. Speakers and microphone is placed in the reverberation room must also have good frequency response. Investment in general, the reverberation room is bigger.

People try to use other ways to get reverberation effect, reverberation plate and spring reverb units vibration transmission is used to obtain the reverberation.

Reverberation plate is a thin metal plate, using tension hanging in a sealed box, the sound through the vibrator make the metal plate produces vibration, and by the repeated reflection, the attenuation of vibration gradually. Put a vibration pickup in the right place, to recover its vibration that produces reverberation. To change the reverberation time, can adjust the position of the damping plate, so as to change the damping of metal plate. The commonly used metal foil; Nickel foil or steel plate, etc.

The vibration of the spring loaded reverberator components for spring. By the sound of spring vibrator produce vibration and torsional movement, so that the vibrating back and forth again and again and gradually decay. At the other end of the spring, install a vibration pickup received signal. Spring usually use several different parameters of the spring in parallel, in order to obtain a different reverberation effects.

Tape reverberator is actually a special type recorder. This recorder has several playback head, there is a certain distance between the playback head make the signals emitted by a certain time lag, adjust the distance of the head, you can get different delay time. If reduce the output level of the playback head one by one, and for the reverb mix it up. By changing the distance of the playback head, or change the tape recorder tape speed can change the reverberation time.

Electronic reverberator and tape reverberator, are having a series of time delay and output level signal, then the superposition and reverberation effects. The adoption of the electronic circuit electronic reverberator produce different delay time, to replace the tape recorder, avoid noise produced by the recorder.

Simpler electronic reverberator adopts shift delay line step by step, will delay some time signal, and then the signal with the original signal in the appropriate mixing ratio, reverberation effects. Delay time depends on the shift of the clock pulse frequency and displacement series. After a certain time delay of the signal for a discrete time signal, through a filter to the recovery of continuous signal. Change the delay time amplitude and the amplitude of the signal, and mix with the original signal, can obtain different reverberation effect.

Is often used in professional audio equipment, digital reverb units, the delay circuit is adopted digital delayer. Digital delayer including AD converter, with a certain length of the shift register, and digital-to-analog converters.

First of all, the original signal by the sampling circuit, sampling, and the AD converter is converted into a discrete time digital signal, the digital signal shift register. Under the control of shift pulse, the digital signal level shift, shift control of pulse frequency and the length of the shift register, delay time can be obtained at the output end of the shift register different signals. After the delay of the signal by digital to analog converter (including filter) for analog signal recovery. Due to the shift in the process of signal in digital form, so that it can't be the introduction of noise, won't make the change amplitude of the signal, and its performance is better. In order to guarantee the accuracy, usually of adc and dac use 12 ~ 16.